Patent Grant
11293732
The present invention generally relates to ammunition articles, and more particularly to methods of making subsonic ammunition casings formed from polymeric materials.
Not applicable.
Not applicable.
Without limiting the scope of the invention, its background is described in connection with lightweight polymer subsonic ammunition casing and more specifically to a lightweight polymer subsonic ammunition casing having a propellant insert positioned in the propellant chamber to reduce the internal volume of the propellant chamber.
Generally, there are two types of ammunition: supersonic ammunition, which fires projectiles with velocities exceeding the speed of sound; and subsonic ammunition, which fires projectiles with velocities less than that of the speed of sound and generally in the range of 1,000-1,100 feet per second (fps), most commonly given at 1,086 fps at standard atmospheric conditions. Traditional methods of making subsonic ammunition reduce the propellant charge (and in turn increasing the empty volume left vacant by the reduced propellant charge) in the shell until the velocity is adequately reduced.
Unfortunately, this empty volume can cause numerous problems including inhibition of proper propellant burn, inconsistent propellant positioning, reduced accuracy and propellant detonation caused by extremely high propellant burn rates. For example, since the propellant is free to move in the large empty volume, shooting downward with the propellant charge away from the primer gives different velocity results than when shooting upwards with the propellant charge close to the primer. Finally, usage of subsonic ammunition, and its attending lower combustion pressures, frequently results in the inability to efficiently cycle semi-automatic or fully automatic weapons where the propellant charge must produce sufficient gas pressure and/or volume to accelerate the projectile and to cycle the firing mechanism. With a reduced quantity of propellant, subsonic ammunition generally fails to produce sufficient pressure to properly cycle the firing mechanism. The art has provided numerous attempts to cure these problems, e.g., the introduction of inert fillers, expandable inner sleeves that occupy the empty space between the propellant and the projectile, insertion of flexible tubing, foamed inserts, stepped down stages in the discharge end of cartridge casings, or complicated three and more component cartridges with rupturable walls and other complicated features. Another approach has been to use standard cartridges in combination with non-standard propellants. However, the result of such prior attempts to solve the production of reliable subsonic cartridges have failed and let to subsonic rounds that have a larger variation in velocity and variance in accuracy potential.
In addition the use of polymer ammunition results in additional drawbacks, e.g., the possibility of the projectile being pushed into the cartridge casing, the bullet pull being too light such that the bullet can fall out, the bullet pull being too insufficient to create sufficient chamber pressure, the bullet pull not being uniform from round to round, and portions of the cartridge casing breaking off upon firing causing the weapon to jam or damage or danger when subsequent rounds are fired or when the casing portions themselves become projectiles. Accordingly, a need exists to develop solutions that make it possible to manufacture better and more price competitive subsonic ammunition than previously available.
The present invention provides a method of making a polymeric subsonic ammunition having a substantially cylindrical metal primer insert comprising the steps of: providing a substantially cylindrical insert comprising a top surface opposite a bottom surface and a substantially cylindrical coupling element that extends from the bottom surface to form a circumferential surface, a primer recess in the top surface that extends toward the bottom surface, a primer flash hole aperture positioned in the primer recess to extend through the bottom surface, and a flange that extends circumferentially about an outer edge of the top surface; forming a substantially cylindrical polymeric middle body comprising the steps of overmolding a polymer composition over the substantially cylindrical insert by molding the polymer composition over the substantially cylindrical coupling element, over the circumferential surface and into the primer flash hole aperture to form a primer flash hole, forming a substantially cylindrical polymeric middle body extending from the substantially cylindrical insert, and forming a substantially cylindrical polymeric coupling end at the end of the substantially cylindrical polymeric middle body; forming a propellant insert to reduce the internal volume of the propellant chamber, wherein the propellant chamber has an internal volume that is at least 10% less than the open internal volume of a standard casing of equivalent caliber; forming a substantially cylindrical open-ended polymeric bullet-end component comprising the steps of forming a polymeric bullet-end coupling component opposite a bullet-end aperture from a second polymer composition, wherein the polymeric bullet-end coupling component mates to the substantially cylindrical polymeric coupling end; adhering the polymeric bullet-end coupling component mates to the substantially cylindrical polymeric coupling end to form a propellant chamber having a bullet-end aperture opposite a primer flash hole; inserting a primer insert into the primer flash hole aperture; at least partially filling the propellant chamber with a propellant; and frictionally fitting a projectile in the bullet-end aperture, wherein the primer, the propellant and the bullet form a sealed propellant chamber.
The present invention provides a method of making a polymeric subsonic ammunition having a substantially cylindrical metal primer insert comprising the steps of: providing a substantially cylindrical insert comprising a top surface opposite a bottom surface and a substantially cylindrical coupling element that extends from the bottom surface to form a circumferential surface, a primer recess in the top surface that extends toward the bottom surface, a primer flash hole aperture positioned in the primer recess to extend through the bottom surface, and a flange that extends circumferentially about an outer edge of the top surface; forming a substantially cylindrical polymeric middle body comprising the steps of overmolding a polymer composition over the substantially cylindrical insert by molding the polymer composition over the substantially cylindrical coupling element, over the circumferential surface but does not extend into the primer flash hole aperture to form a primer flash hole without a polymer coating, forming a substantially cylindrical polymeric middle body extending from the substantially cylindrical insert, and forming a substantially cylindrical polymeric coupling end at the end of the substantially cylindrical polymeric middle body; forming a propellant insert to reduce the internal volume of the propellant chamber, wherein the propellant chamber has an internal volume that is at least 10% less than the open internal volume of a standard casing of equivalent caliber; forming a substantially cylindrical open-ended polymeric bullet-end component comprising the steps of forming a polymeric bullet-end coupling component opposite a bullet-end aperture from a second polymer composition, wherein the polymeric bullet-end coupling component mates to the substantially cylindrical polymeric coupling end; adhering the polymeric bullet-end coupling component mates to the substantially cylindrical polymeric coupling end to form a propellant chamber having a bullet-end aperture opposite a primer flash hole; inserting a primer insert into the primer flash hole aperture; at least partially filling the propellant chamber with a propellant; and frictionally fitting a projectile in the bullet-end aperture, wherein the primer, the propellant and the bullet form a sealed propellant chamber.
The substantially cylindrical polymeric bullet-end component may include a shoulder positioned between the substantially cylindrical polymeric coupling end and the bullet aperture. The substantially cylindrical primer insert may include a flash hole groove formed about the primer aperture on the bottom surface and the polymer extends over the substantially cylindrical inner surface to the flash hole groove to form a primer flash hole. The propellant chamber may contain a propellant volume such that a projectile does not exceed a velocity of 1200 feet per second at sea level under standard atmospheric conditions when fired. The method of claim 1, wherein the propellant chamber contains a propellant volume such that a projectile does not exceed the velocity of 1,086 feet per second at standard atmospheric conditions when fired. The method further includes the step of securing a projectile to the bullet aperture by a mechanical interference, adhesive, ultrasonic welding, the combination of molding in place and adhesive, or hot crimping after molding. The substantially cylindrical polymeric middle body, the substantially cylindrical polymeric bullet-end component and the propellant insert independently may include a material selected from the group consisting of polyphenylsulfone, polycarbonate, and polyamide. The substantially cylindrical polymeric middle body, the substantially cylindrical polymeric bullet-end component and the propellant insert may independently include at least one additive selected from the group consisting of plasticizers, lubricants, molding agents, fillers, thermo-oxidative stabilizers, flame-retardants, coloring agents, compatibilizers, impact modifiers, release agents, reinforcing fibers and reinforcing agents. The propellant insert may include a substantially cylindrical shape. The propellant insert may include a free formed shape. The propellant insert may include a one or more ribs extending into the propellant chamber. The propellant insert may include a radial cross-section selected from the group consisting of circular, ovoid, octagonal, hexagonal, triangular, star, ribbed, square and a combination thereof. The radial cross-section of the propellant chamber may be irregular along its longitudinal length. The radial size of the propellant chamber tapers along its longitudinal direction. The polymeric casing body and propellant insert may be formed of different polymeric materials. The substantially cylindrical polymeric middle body, the substantially cylindrical polymeric bullet-end component and the propellant insert may independently comprise the same polymeric material. The substantially cylindrical polymeric middle body, the substantially cylindrical polymeric bullet-end component and the propellant insert independently may be different polymeric materials. The propellant chamber may be formed of a separate propellant insert disposed within the internal cavity of the generally cylindrical hollow polymer body.
For a more complete understanding of the features and advantages of the present invention, reference is now made to the detailed description of the invention along with the accompanying figures and in which:
While the making and using of various embodiments of the present invention are discussed in detail below, it should be appreciated that the present invention provides many applicable inventive concepts that can be embodied in a wide variety of specific contexts. The specific embodiments discussed herein are merely illustrative of specific ways to make and use the invention and do not delimit the scope of the invention.
To facilitate the understanding of this invention, a number of terms are defined below. Terms defined herein have meanings as commonly understood by a person of ordinary skill in the areas relevant to the present invention. Terms such as “a”, “an” and “the” are not intended to refer to only a singular entity, but include the general class of which a specific example may be used for illustration. The terminology herein is used to describe specific embodiments of the invention, but their usage does not delimit the invention, except as outlined in the claims.
As used herein, the term “ammunition”, “ammunition article”, “munition”, and “munition article” as used herein may be used interchangeably to refer to a complete, assembled round or cartridge of that is ready to be loaded into a firearm and fired, including cap, casing, propellant, projectile, etc. Ammunition may be a live round fitted with a projectile, or a blank round with no projectile and may also be other types such as non-lethal rounds, rounds containing rubber bullets, rounds containing multiple projectiles (shot), and rounds containing projectiles other than bullets such as fluid-filled canisters and capsules. Ammunition may be any caliber of pistol or rifle ammunition, e.g., non limiting examples include .22, .22-250, .223, .243, .25-06, .270, .300, .30-30, .30-40, 30.06, .300, .303, .308, .338, .357, .38, .380, .40, .44, .45, .45-70, .50 BMG, 5.45 mm, 5.56 mm, 6.5 mm, 6.8 mm, 7 mm, 7.62 mm, 8 mm, 9 mm, 10 mm, 12.7 mm, 14.5 mm, 20 mm, 25 mm, 30 mm, 40 mm and others.
As used herein, the term “subsonic ammunition” refers to ammunition that ejects a projectile at velocities of less than the speed of sound at standard atmospheric conditions, e.g., generally in the range of 1,000-1,100 feet per second (fps) but may range from 900-1,200 feet per second (fps) depending on the altitude and atmospheric conditions. Specific examples include about 1000 fps, 1010 fps, 1020 fps, 1030 fps, 1040 fps, 1050 fps, 1060 fps, 1070 fps, 1080 fps, 1086 fps, 1090 fps, and even 1099 fps.
As used herein, the term “casing” and “case” and “body” are used interchangeably (e.g., “cartridge casing”, “cartridge case” and “casing body”) to refer to the portion of the ammunition that remains intact after firing and includes the propellant chamber and may include the primer insert. A cartridge casing may be one-piece, two-piece, three piece or multi-piece design that includes a mouth at one end and a primer insert at the other separated by a propellant chamber.
A traditional cartridge casing generally has a deep-drawn elongated body with a primer end and a projectile end. During use, a weapon's cartridge chamber supports the majority of the cartridge casing wall in the radial direction, however, in many weapons, a portion of the cartridge base end is unsupported. During firing, the greatest stresses are concentrated at the base end of the cartridge, which must have great mechanical strength. This is true for both subsonic and supersonic ammunition cartridges.
There is a need for a subsonic polymer ammunition cartridge to reduce cost, weight and reliability. The traditional avenue to subsonic ammunition is usage of a reduced quantity of propellant compared to traditional supersonic ammunition. For example, a traditional 7.62 mm ammunition uses about 45 grains of propellant and generates projectile velocities of 2000-3000 fps, a subsonic ammunition uses less than about 15 grains of propellant to generate projectile velocities of less than 1,100 fps. The present inventors determined that a subsonic cartridge casing may be produced by the design and construction of an engineered internal propellant chamber within the overall internal volume of the casing. The internal propellant chamber positioned within the casing may be in the form of a propellant chamber insert that is made separately and inserted into the chamber. Alternatively the propellant chamber insert may be made as a part of the middle body component and the propellant chamber by increasing the thickness of the side wall. The propellant chamber insert will function to reduce the size of the propellant chamber which will reduce the amount of propellant in the propellant chamber and in turn reduce the velocity of the projectile. In particular, the propellant chamber insert reduces the internal volume of the propellant chamber by more than 15% or 20% compared to the equivalent supersonic casing of the same caliber. In addition, using such a propellant chamber insert allows the internal propellant chamber of existing ammunition cartridge casings to be used allowing ammunition manufacturer to assemble the cartridge casing in a rapid fashion without the need for additional manufacturing steps or complex design parameters.
The propellant chamber insert when in the form of an integral portion of the cartridge casing is constructed out of the same polymer composition as the cartridge casing. When the propellant chamber insert is a separate insert positioned within the propellant chamber, the propellant chamber insert may be of a similar or a different polymer composition than the cartridge casing. It will also be recognized that in any of the embodiments described herein, the outer wall and inner volume occupying portions of the cartridge casing need not necessarily be of the same polymeric material. For example, the outer wall could be made of polymers with higher temperature resistance to resist the hot chamber conditions, while the inner volume occupying portion could be manufactured out of low cost polymers or be made with voids or ribs to reduce the amount of material used. In one embodiment, the space defined between the outer wall and the propellant chamber includes voids or ribs. In another embodiment, the propellant chamber comprises multiple separate internal volumes each in combustible communication with the primer. In still yet another such embodiment, the propellant chamber has a radial cross-section selected from the group consisting of circular, ovoid, octagonal, hexagonal, triangular, and square. In one embodiment, the radial cross-section of the propellant chamber is irregular along its longitudinal length. In another embodiment, the radial size of the propellant chamber tapers along its longitudinal direction. In another embodiment, the propellant chamber has a radial cross-section selected from the group consisting of circular, ovoid, octagonal, hexagonal, triangular, and square. In one such embodiment, the radial cross-section of the propellant chamber is irregular along its longitudinal length. In another such embodiment, the radial size of the propellant chamber tapers along its longitudinal direction.
One skilled in the art will also readily observe that different or identical coloring of the polymers used could aid in identification or marketing of the ammunition of the current invention. Another embodiment of this invention would be the usage of transparent or translucent polymers, allowing for easy identification of the propellant level or cartridge load.
For example, a non-limiting list of suitable polymeric materials, for both the cartridge casing and the propellant chamber insert may be selected from any number of polymeric materials, e.g., polyamides, polyimides, polyesters, polycarbonates, polysulfones, polylactones, polyacetals, acrylonitrile/butadiene/styrene copolymer resins, polyphenylene oxides, ethylene/carbon monoxide copolymers, polyphenylene sulfides, polystyrene, styrene/acrylonitrile copolymer resins, styrene/maleic anhydride copolymer resins, aromatic polyketones and mixtures thereof. Preferred embodiments will be manufactured from any polymer with a glass transition temperature of less than 250° C. Particularly suitable materials include polyphenylsulfones, polycarbonates and polyamides.
The polymeric and composite casing components may be injection molded. Polymeric materials for the bullet-end and middle body components must have propellant compatibility and resistance to gun cleaning solvents and grease, as well as resistance to chemical, biological and radiological agents. The polymeric materials must have a temperature resistance higher than the cook-off temperature of the propellant, typically about 320° F. The polymeric materials must have elongation-to-break values that to resist deformation under interior ballistic pressure as high as 60,000 psi in all environments (temperatures from about −65 to about 320° F. and humidity from 0 to 100% relative humidity). According to one embodiment, the middle body component is either molded onto or snap-fit to the casing head-end component after which the bullet-end component is snap-fit or interference fit to the middle body component. The components may be formed from high-strength polymer, composite or ceramic.
Examples of suitable high strength polymers include composite polymer material including a tungsten metal powder, nylon 6/6, nylon 6, and glass fibers; and a specific gravity in a range of 3-10. The tungsten metal powder may be 50%-96% of a weight of the bullet body. The polymer material also includes about 0.5-15%, preferably about 1-12%, and most preferably about 2-9% by weight, of nylon 6/6, about 0.5-15%, preferably about 1-12%, and most preferably about 2-9% by weight, of nylon 6, and about 0.5-15%, preferably about 1-12%, and most preferably about 2-9% by weight, of glass fibers. It is most suitable that each of these ingredients be included in amounts less than 10% by weight. The cartridge casing body may be made of a modified ZYTEL® resin, available from E.I. DuPont De Nemours Co., a modified 612 nylon resin, modified to increase elastic response.
Commercially available polymers suitable for use in the present invention thus include polyphenylsulfones; copolymers of polyphenylsulfones with polyether-sulfones or polysulfones; copolymers and blends of polyphenylsulfones with polysiloxanes; poly(etherimide-siloxane); copolymers and blends of polyetherimides and polysiloxanes, and blends of polyetherimides and poly(etherimide-siloxane) copolymers; and the like. Particularly preferred are polyphenylsulfones and their copolymers with poly-sulfones or polysiloxane that have high tensile strength and elongation-to-break to sustain the deformation under high interior ballistic pressure. Such polymers are commercially available, for example, RADEL® R5800 polyphenylesulfone from Solvay Advanced Polymers. The polymer can be formulated with up to about 10 wt % of one or more additives selected from internal mold release agents, heat stabilizers, anti-static agents, colorants, impact modifiers and UV stabilizers.
Examples of suitable polymers include polyurethane prepolymer, cellulose, fluoro-polymer, ethylene inter-polymer alloy elastomer, ethylene vinyl acetate, nylon, polyether imide, polyester elastomer, polyester sulfone, polyphenyl amide, polypropylene, polyvinylidene fluoride or thermoset polyurea elastomer, acrylics, homopolymers, acetates, copolymers, acrylonitrile-butadinen-styrene, thermoplastic fluoro polymers, inomers, polyamides, polyamide-imides, polyacrylates, polyatherketones, polyaryl-sulfones, polybenzimidazoles, polycarbonates, polybutylene, terephthalates, polyether imides, polyether sulfones, thermoplastic polyimides, thermoplastic polyurethanes, polyphenylene sulfides, polyethylene, polypropylene, polysulfones, polyvinylchlorides, styrene acrylonitriles, polystyrenes, polyphenylene, ether blends, styrene maleic anhydrides, polycarbonates, allyls, aminos, cyanates, epoxies, phenolics, unsaturated polyesters, bismaleimides, polyurethanes, silicones, vinylesters, or urethane hybrids. Examples of suitable polymers also include aliphatic or aromatic polyamide, polyeitherimide, polysulfone, polyphenylsulfone, poly-phenylene oxide, liquid crystalline polymer and polyketone. Examples of suitable composites include polymers such as polyphenylsulfone reinforced with between about 30 and about 70 wt %, and preferably up to about 65 wt % of one or more reinforcing materials selected from glass fiber, ceramic fiber, carbon fiber, mineral fillers, organo nanoclay, or carbon nanotube. Preferred reinforcing materials, such as chopped surface-treated E-glass fibers provide flow characteristics at the above-described loadings comparable to unfilled polymers to provide a desirable combination of strength and flow characteristics that permit the molding of head-end components. Composite components can be formed by machining or injection molding. Finally, the cartridge case must retain sufficient joint strength at cook-off temperatures. More specifically, polymers suitable for molding of the projectile-end component have one or more of the following properties: Yield or tensile strength at −65° F.>10,000 psi Elongation-to-break at −65° F.>15% Yield or tensile strength at 73° F.>8,000 psi Elongation-to-break at 73° F.>50% Yield or tensile strength at 320° F.>4,000 psi Elongation-to-break at 320° F.>80%. Polymers suitable for molding of the middle-body component have one or more of the following properties: Yield or tensile strength at −65° F.>10,000 psi Yield or tensile strength at 73° F.>8,000 psi Yield or tensile strength at 320° F.>4,000 psi.
In one embodiment, the polymeric material additionally includes at least one additive selected from plasticizers, lubricants, molding agents, fillers, thermo-oxidative stabilizers, flame-retardants, coloring agents, compatibilizers, impact modifiers, release agents, reinforcing fibers. In still another such embodiment, the polymeric material comprises a material selected from the group consisting of polyphenylsulfone, polycarbonate, and polyamide. In such an embodiment, the polymeric material may include a translucent or transparent polymer. In another such embodiment, the polymeric material may include a polymeric material possessing a glass transition temperature of less than 250° C.
The polymers of the present invention can also be used for conventional two-piece metal-plastic hybrid cartridge case designs and conventional shotgun shell designs. One example of such a design is an ammunition cartridge with a one-piece substantially cylindrical polymeric cartridge casing body with an open projectile-end and an end opposing the projectile-end with a male or female coupling element; and a cylindrical metal cartridge casing head-end component with an essentially closed base end with a primer hole opposite an open end having a coupling element that is a mate for the coupling element on the opposing end of the polymeric cartridge casing body joining the open end of the head-end component to the opposing end of the polymeric cartridge casing body. The high polymer ductility permits the casing to resist breakage.
A cartridge casing 10 suitable for use with high velocity rifles is shown manufactured with a casing 12 showing a propellant chamber 14 with a projectile (not shown) inserted into the forward end opening 16. The cartridge casing 12 has a substantially cylindrical open-ended bullet-end component 18 extending from the forward end opening 16 rearward to the opposite end 20. The forward end of bullet-end component 18 has a shoulder 24 forming a chamber neck 26. The bullet-end component 18 may be formed with coupling end 22 formed on substantially cylindrical opposite end 20 or formed as a separate component. These and other suitable methods for securing individual pieces of a two-piece or multi-piece cartridge casing are useful in the practice of the present invention. Coupling end 22 is shown as a female element, but may also be configured as a male element in alternate embodiments of the invention. The forward end of bullet-end component 18 has a shoulder 24 forming chamber neck 26. The bullet-end component typically has a wall thickness between about 0.003 and about 0.200 inches and more preferably between about 0.005 and more preferably between about 0.150 inches about 0.010 and about 0.050 inches.
The middle body component 28 is substantially cylindrical and connects the forward end of bullet-end component 18 to the substantially cylindrical opposite end 20 and forms the propellant chamber 14. The substantially cylindrical opposite end 20 includes a substantially cylindrical insert 32 that partially seals the propellant chamber 14. The substantially cylindrical insert 32 includes a bottom surface 34 located in the propellant chamber 14 that is opposite a top surface 36. The substantially cylindrical insert 32 includes a primer recess 38 positioned in the top surface 36 extending toward the bottom surface 34 with a primer flash hole aperture 42 is located in the primer recess 38 and extends through the bottom surface 34 into the propellant chamber 14 to combust the propellant in the propellant chamber 14. A primer (not shown) is located in the primer recess 38 and extends through the bottom surface 34 into the propellant chamber 14. When molded the coupling end 22 extends the polymer through the primer flash hole aperture 42 to form the primer flash hole 40 while retaining a passage from the top surface 36 through the bottom surface 34 and into the propellant chamber 14 to provide support and protection about the primer flash hole aperture 42. The bullet-end 18, middle body 28 and bottom surface 34 define the interior of propellant chamber 14 in which the powder charge (not shown) is contained. The interior volume of propellant chamber 14 may be varied to provide the volume necessary for complete filling of the propellant chamber 14 by the propellant chosen so that a simplified volumetric measure of propellant can be utilized when loading the cartridge. The propellant chamber 14 includes a propellant chamber insert 66 that extends from the bottom surface 34 to the shoulder 24. The thickness of the propellant chamber insert 66 may be defined as the distance from the propellant chamber 14 to the interior of the middle body component 28 and may be varied as necessary to achieve the desired velocity depending on the propellant used. The propellant chamber 14 includes a propellant chamber insert 66 that extends from the bottom surface 34 to the shoulder 24 at a graduated distance from the propellant chamber 14 to the interior of the middle body component 28. For example,
The middle body component 28 is connected to a substantially cylindrical coupling element 30 of the substantially cylindrical insert 32. Coupling element 30, as shown may be configured as a male element, however, all combinations of male and female configurations is acceptable for coupling elements 30 and coupling end 22 in alternate embodiments of the invention. Coupling end 22 of bullet-end component 18 fits about and engages coupling element 30 of a substantially cylindrical insert 32. The substantially cylindrical insert 32 includes a substantially cylindrical coupling element 30 extending from a bottom surface 34 that is opposite a top surface 36. Located in the top surface 36 is a primer recess 38 that extends toward the bottom surface 34. A primer flash hole 40 extends through the bottom surface 34 into the propellant chamber 14. The coupling end 22 extends the polymer through the primer flash hole aperture 42 to form an primer flash hole 40 while retaining a passage from the top surface 36 through the bottom surface 34 and into the propellant chamber 14 to provide support and protection about the primer flash hole 40. When contacted the coupling end 22 interlocks with the substantially cylindrical coupling element 30, through the coupling element 30 that extends with a taper to a smaller diameter at the tip 44 to form a physical interlock between substantially cylindrical insert 32 and middle body component 28. Polymer casing 12 also has a substantially cylindrical open-ended middle body component 28. The middle body component extends from a forward end opening 16 to coupling element 22. The middle body component typically has a wall thickness between about 0.003 and about 0.200 inches and more preferably between about 0.005 and more preferably between about 0.150 inches about 0.010 and about 0.050 inches.
The substantially cylindrical insert 32 also has a flange 46 cut therein and a primer recess 38 formed therein for ease of insertion of the primer (not shown). The primer recess 38 is sized so as to receive the primer (not shown) in an friction fit during assembly. The cartridge casing 12 may be molded from a polymer composition with the middle body component 28 being over-molded onto the substantially cylindrical insert 32. When over-molded the coupling end 22 extends the polymer through the primer flash hole aperture 42 to form the primer flash hole 40 while retaining a passage from the top surface 36 through the bottom surface 34 and into the propellant chamber 14 to provide support and protection about the primer flash hole aperture 42. The primer flash hole 40 communicates through the bottom surface 34 of substantially cylindrical insert 32 into the propellant chamber 14 so that upon detonation of primer (not shown) the propellant (not shown) in propellant chamber 14 will be ignited. The bullet-end component 18 and middle body component 28 can be welded or bonded together using solvent, adhesive, spin-welding, vibration-welding, ultrasonic-welding or laser-welding techniques. Other possible securing methods include, but are not limited to, mechanical interlocking methods such as over molding, press-in, ribs and threads, adhesives, molding in place, heat crimping, ultrasonic welding, friction welding etc.
The middle body component 28 is connected to a substantially cylindrical coupling element 30 of the substantially cylindrical insert 32. Coupling element 30, as shown may be configured as a male element, however, all combinations of male and female configurations is acceptable for coupling elements 30 and coupling end 22 in alternate embodiments of the invention. Coupling end 22 of bullet-end component 18 fits about and engages coupling element 30 of a substantially cylindrical insert 32. The substantially cylindrical insert 32 includes a substantially cylindrical coupling element 30 extending from a bottom surface 34 that is opposite a top surface 36. Located in the top surface 36 is a primer recess 38 that extends toward the bottom surface 34. A flash hole aperture 42 extends through the bottom surface 34 into the propellant chamber 14. The coupling end 22 extends the polymer through the primer flash hole 40 to form an aperture coating 42 while retaining a passage from the top surface 36 through the bottom surface 34 and into the propellant chamber 14 to provides support and protection about the primer flash hole 40. The propellant chamber 14 includes a propellant chamber insert 66 that extends from the bottom surface 34 to the shoulder 24. The thickness of the propellant chamber insert 66 may be defined as the distance from the propellant chamber 14 to the interior of the middle body component 28 and may be varied as necessary to achieve the desired velocity depending on the propellant used. The propellant chamber insert 66 may be made of the same material as the casing or a different material. The propellant chamber insert 66 may be formed by extending the casing wall or may be made by forming a separate insert that is formed and then inserted into the propellant chamber 14 during assembly. When contacted the coupling end 22 interlocks with the substantially cylindrical coupling element 30, through the coupling element 30 that extends with a taper to a smaller diameter at the tip 44 to form a physical interlock between substantially cylindrical insert 32 and middle body component 28. Polymer casing 12 also has a substantially cylindrical open-ended middle body component 28. The middle body component extends from a forward end opening 16 to coupling element 22. Located in the top surface 36 is a primer recess 38 that extends toward the bottom surface 34 with a diffuser 50 positioned in the primer recess 38. The diffuser 50 includes a diffuser aperture 52 that aligns with the primer flash hole 40. The diffuser 50 is a device that is used to divert the affects of the primer (not shown) off of the polymer. The affects being the impact from igniting the primer as far as pressure and heat to divert the energy of the primer off of the polymer and directing it to the flash hole.
The substantially cylindrical insert 32 also has a flange 46 cut therein and a primer recess 38 formed therein for ease of insertion of the primer (not shown). The primer recess 38 is sized so as to receive the primer (not shown) in an interference fit during assembly. The cartridge casing 12 may be molded from a polymer composition with the middle body component 28 being over-molded onto the substantially cylindrical insert 32. When over-molded the coupling end 22 extends the polymer through the primer flash hole aperture 42 to form the primer flash hole 40 while retaining a passage from the top surface 36 through the bottom surface 34 and into the propellant chamber 14 to provide support and protection about the primer flash hole aperture 42. The primer flash hole 40 communicates through the bottom surface 34 of substantially cylindrical insert 32 into the propellant chamber 14 so that upon detonation of primer (not shown) the propellant (not shown) in propellant chamber 14 will be ignited. The bullet-end component 18 and middle body component 28 can be welded or bonded together using solvent, adhesive, spin-welding, vibration-welding, ultrasonic-welding or laser-welding techniques.
The middle body component 28 is connected to a substantially cylindrical coupling element 30 of the substantially cylindrical insert 32. Coupling element 30, as shown may be configured as a male element, however, all combinations of male and female configurations is acceptable for coupling elements 30 and coupling end 22 in alternate embodiments of the invention. Coupling end 22 of bullet-end component 18 fits about and engages coupling element 30 of a substantially cylindrical insert 32. The substantially cylindrical insert 32 includes a substantially cylindrical coupling element 30 extending from a bottom surface 34 that is opposite a top surface 36. Located in the top surface 36 is a primer recess 38 that extends toward the bottom surface 34. A primer flash hole 40 extends through the bottom surface 34 into the propellant chamber 14. The coupling end 22 extends the polymer through the flash hole aperture 42 to form a primer flash hole 40 while retaining a passage from the top surface 36 through the bottom surface 34 and into the propellant chamber 14. When contacted the coupling end 22 interlocks with the substantially cylindrical coupling element 30, through the coupling element 30 that extends with a taper to a smaller diameter at the tip 44 to form a physical interlock between substantially cylindrical insert 32 and middle body component 28. Polymer casing 12 also has a substantially cylindrical open-ended middle body component 28. The middle body component extends from a forward end opening 16 to coupling element 22. The middle body component typically has a wall thickness between about 0.003 and about 0.200 inches and more preferably between about 0.005 and more preferably between about 0.150 inches about 0.010 and about 0.050 inches.
It is understood that the propellant chamber insert 66 can be of any geometry and profile to reduce the propellant chamber volume. The propellant chamber insert 66 may be uniformed in the geometry and profile or may vary in geometry, profile or both to achieve the desired burn and propellant chamber volume. In addition, the propellant chamber insert can be formed simultaneously with the case by over-molding or machining or can be prepared separate from the case and assembled sequentially. The propellant chamber insert 66 can be bonded, welded or otherwise affixed to the case.
One embodiment includes a 2 cavity mold having an upper portion and a base portion for a 5.56 case having a metal insert over-molded with a Nylon 6 (polymer) based material. In this embodiment, the polymer in the base forms a lip or flange to extract the case from the weapon. One 2-cavity mold to produce the upper portion of the 5.56 case can be made using a stripper plate tool using an Osco hot spur and two subgates per cavity. Another embodiment includes a subsonic version, the difference from the standard and the subsonic version is the walls are thicker thus requiring less powder to decrease the velocity of the bullet creating a subsonic round.
The extracting inserts is used to give the polymer case a tough enough ridge and groove for the weapons extractor to grab and pull the case out the chamber of the gun. The extracting insert is made of 17-4 SS (stainless steel) that is hardened to 42-45 rc. The insert may be made of aluminum, brass, cooper, steel or even an engineered resin with enough tensile strength.
The insert is over molded in an injection molded process using a nano clay particle filled Nylon material. The inserts can be machined or stamped. In addition, an engineered resin able to withstand the demand on the insert allows injection molded and/or even transfer molded.
One of ordinary skill in the art will know that many propellant types and weights can be used to prepare workable ammunition and that such loads may be determined by a careful trial including initial low quantity loading of a given propellant and the well known stepwise increasing of a given propellant loading until a maximum acceptable load is achieved. Extreme care and caution is advised in evaluating new loads. The propellants available have various burn rates and must be carefully chosen so that a safe load is devised.
It will be understood that particular embodiments described herein are shown by way of illustration and not as limitations of the invention. The principal features of this invention can be employed in various embodiments without departing from the scope of the invention. Those skilled in the art will recognize, or be able to ascertain using no more than routine experimentation, numerous equivalents to the specific procedures described herein. Such equivalents are considered to be within the scope of this invention and are covered by the claims.
All publications and patent applications mentioned in the specification are indicative of the level of skill of those skilled in the art to which this invention pertains. All publications and patent applications are herein incorporated by reference to the same extent as if each individual publication or patent application was specifically and individually indicated to be incorporated by reference.
The use of the word “a” or “an” when used in conjunction with the term “comprising” in the claims and/or the specification may mean “one,” but it is also consistent with the meaning of “one or more,” “at least one,” and “one or more than one.” The use of the term “or” in the claims is used to mean “and/or” unless explicitly indicated to refer to alternatives only or the alternatives are mutually exclusive, although the disclosure supports a definition that refers to only alternatives and “and/or.” Throughout this application, the term “about” is used to indicate that a value includes the inherent variation of error for the device, the method being employed to determine the value, or the variation that exists among the study subjects.
As used in this specification and claim(s), the words “comprising” (and any form of comprising, such as “comprise” and “comprises”), “having” (and any form of having, such as “have” and “has”), “including” (and any form of including, such as “includes” and “include”) or “containing” (and any form of containing, such as “contains” and “contain”) are inclusive or open-ended and do not exclude additional, unrecited elements or method steps.
The term “or combinations thereof” as used herein refers to all permutations and combinations of the listed items preceding the term. For example, “A, B, C, or combinations thereof” is intended to include at least one of: A, B, C, AB, AC, BC, or ABC, and if order is important in a particular context, also BA, CA, CB, CBA, BCA, ACB, BAC, or CAB. Continuing with this example, expressly included are combinations that contain repeats of one or more item or term, such as BB, AAA, AB, BBC, AAABCCCC, CBBAAA, CABABB, and so forth. The skilled artisan will understand that typically there is no limit on the number of items or terms in any combination, unless otherwise apparent from the context.
All of the compositions and/or methods disclosed and claimed herein can be made and executed without undue experimentation in light of the present disclosure. While the compositions and methods of this invention have been described in terms of preferred embodiments, it will be apparent to those of skill in the art that variations may be applied to the compositions and/or methods and in the steps or in the sequence of steps of the method described herein without departing from the concept, spirit and scope of the invention. All such similar substitutes and modifications apparent to those skilled in the art are deemed to be within the spirit, scope and concept of the invention as defined by the appended claims.
This application is a Divisional Application of U.S. patent application Ser. No. 14/751,973 filed on Jun. 26, 2015, which is a Continuation-in-Part Application of U.S. patent application Ser. No. 14/011,202 filed on Aug. 27, 2013 now U.S. Pat. No. 9,546,849 issued Jan. 17, 2017, which is a divisional application of U.S. patent application Ser. No. 13/292,843 filed on Nov. 9, 2011 now U.S. Pat. No. 8,561,543 issued Oct. 22, 2013, which claims the benefit of U.S. Provisional Patent Application Ser. No. 61/456,664, filed Nov. 10, 2010, the contents of each are hereby incorporated by reference in their entirety.
| Number | Name | Date | Kind |
|---|---|---|---|
| 99528 | Boyd | Feb 1870 | A |
| 113634 | Crispin | Apr 1871 | A |
| 130679 | Whitmore | Aug 1872 | A |
| 159665 | Gauthey | Feb 1875 | A |
| 169807 | Hart | Nov 1875 | A |
| 207248 | Bush et al. | Aug 1878 | A |
| 462611 | Comte de Sparre | Nov 1891 | A |
| 475008 | Bush | May 1892 | A |
| 498856 | Overbaugh | Jun 1893 | A |
| 640856 | Bailey | Jan 1900 | A |
| 662137 | Tellerson | Nov 1900 | A |
| 676000 | Henneberg | Jun 1901 | A |
| 743242 | Bush | Nov 1903 | A |
| 865979 | Bailey | Sep 1907 | A |
| 869046 | Bailey | Oct 1907 | A |
| 905358 | Peters | Dec 1908 | A |
| 957171 | Loeb | May 1910 | A |
| 963911 | Loeble | Jul 1910 | A |
| 1060817 | Clyne | May 1913 | A |
| 1060818 | Clyne | May 1913 | A |
| 1936905 | Gaidos | Nov 1933 | A |
| 1940657 | Woodford | Dec 1933 | A |
| 2294822 | Norman | Sep 1942 | A |
| 2465962 | Allen et al. | Mar 1949 | A |
| 2654319 | Roske | Oct 1953 | A |
| 2823611 | Thayer | Feb 1958 | A |
| 2862446 | Lars | Dec 1958 | A |
| 2918868 | Lars | Dec 1959 | A |
| 2953990 | Miller | Sep 1960 | A |
| 2972947 | Fitzsimmons et al. | Feb 1961 | A |
| 3099958 | Daubenspeck et al. | Aug 1963 | A |
| 3159701 | Herter | Dec 1964 | A |
| 3170401 | Johnson et al. | Feb 1965 | A |
| 3171350 | Metcalf et al. | Mar 1965 | A |
| 3242789 | Woodring | Mar 1966 | A |
| 3292538 | Hans et al. | Dec 1966 | A |
| 3332352 | Olson et al. | Jul 1967 | A |
| 3485170 | Scanlon | Dec 1969 | A |
| 3485173 | Morgan | Dec 1969 | A |
| 3609904 | Scanlon | Oct 1971 | A |
| 3659528 | Santala | May 1972 | A |
| 3688699 | Horn et al. | Sep 1972 | A |
| 3690256 | Schnitzer | Sep 1972 | A |
| 3745924 | Scanlon | Jul 1973 | A |
| 3749021 | Burgess | Jul 1973 | A |
| 3756156 | Schuster | Sep 1973 | A |
| 3765297 | Skochko et al. | Oct 1973 | A |
| 3768413 | Ramsay | Oct 1973 | A |
| 3797396 | Reed | Mar 1974 | A |
| 3842739 | Scanlon et al. | Oct 1974 | A |
| 3866536 | Greenberg | Feb 1975 | A |
| 3874294 | Hale | Apr 1975 | A |
| 3955506 | Luther et al. | May 1976 | A |
| 3977326 | Anderson et al. | Aug 1976 | A |
| 3990366 | Scanlon | Nov 1976 | A |
| 4005630 | Patrick | Feb 1977 | A |
| 4020763 | Iruretagoyena | May 1977 | A |
| 4147107 | Ringdal | Apr 1979 | A |
| 4157684 | Clausser | Jun 1979 | A |
| 4173186 | Dunham | Nov 1979 | A |
| 4187271 | Rolston et al. | Feb 1980 | A |
| 4228724 | Leich | Oct 1980 | A |
| 4276830 | Alice | Jul 1981 | A |
| 4475435 | Mantel | Oct 1984 | A |
| 4483251 | Spalding | Nov 1984 | A |
| 4598445 | O'Connor | Jul 1986 | A |
| 4614157 | Grelle et al. | Sep 1986 | A |
| 4679505 | Reed | Jul 1987 | A |
| 4718348 | Ferrigno | Jan 1988 | A |
| 4719859 | Ballreich et al. | Jan 1988 | A |
| 4726296 | Leshner et al. | Feb 1988 | A |
| 4763576 | Kass et al. | Aug 1988 | A |
| 4867065 | Kaltmann et al. | Sep 1989 | A |
| 4970959 | Bilsbury et al. | Nov 1990 | A |
| 5021206 | Stoops | Jun 1991 | A |
| 5033386 | Vatsvog | Jul 1991 | A |
| 5063853 | Bilgeri | Nov 1991 | A |
| 5090327 | Bilgeri | Feb 1992 | A |
| 5151555 | Vatsvog | Sep 1992 | A |
| 5165040 | Andersson et al. | Nov 1992 | A |
| 5237930 | Belanger et al. | Aug 1993 | A |
| 5247888 | Conil | Sep 1993 | A |
| 5259288 | Vatsvog | Nov 1993 | A |
| 5265540 | Ducros et al. | Nov 1993 | A |
| D345676 | Biffle | Apr 1994 | S |
| 5433148 | Barratault et al. | Jul 1995 | A |
| 5535495 | Gutowski | Jul 1996 | A |
| 5563365 | Dineen et al. | Oct 1996 | A |
| 5616642 | West et al. | Apr 1997 | A |
| D380650 | Norris | Jul 1997 | S |
| 5679920 | Hallis et al. | Oct 1997 | A |
| 5770815 | Watson | Jun 1998 | A |
| 5798478 | Beal | Aug 1998 | A |
| 5950063 | Hens et al. | Sep 1999 | A |
| 5961200 | Friis | Oct 1999 | A |
| 5969288 | Baud | Oct 1999 | A |
| 6004682 | Rackovan et al. | Dec 1999 | A |
| 6048379 | Bray et al. | Apr 2000 | A |
| 6070532 | Halverson | Jun 2000 | A |
| D435626 | Benini | Dec 2000 | S |
| 6257149 | Cesaroni | Jul 2001 | B1 |
| D447209 | Benini | Aug 2001 | S |
| 6272993 | Cook et al. | Aug 2001 | B1 |
| 6283035 | Olson et al. | Sep 2001 | B1 |
| 6357357 | Glasser | Mar 2002 | B1 |
| D455052 | Gullickson et al. | Apr 2002 | S |
| D455320 | Edelstein | Apr 2002 | S |
| 6375971 | Hansen | Apr 2002 | B1 |
| 6450099 | Desgland | Sep 2002 | B1 |
| 6460464 | Attarwala | Oct 2002 | B1 |
| 6523476 | Riess et al. | Feb 2003 | B1 |
| 6649095 | Buja | Nov 2003 | B2 |
| 6672219 | Mackerell et al. | Jan 2004 | B2 |
| 6708621 | Forichon-Chaumet et al. | Mar 2004 | B1 |
| 6752084 | Husseini et al. | Jun 2004 | B1 |
| 6810816 | Rennard | Nov 2004 | B2 |
| 6840149 | Beal | Jan 2005 | B2 |
| 6845716 | Husseini et al. | Jan 2005 | B2 |
| 7000547 | Amick | Feb 2006 | B2 |
| 7014284 | Morton et al. | Mar 2006 | B2 |
| 7032492 | Meshirer | Apr 2006 | B2 |
| 7056091 | Powers | Jun 2006 | B2 |
| 7059234 | Husseini | Jun 2006 | B2 |
| 7159519 | Robinson et al. | Jan 2007 | B2 |
| 7165496 | Reynolds | Jan 2007 | B2 |
| D540710 | Charrin | Apr 2007 | S |
| 7204191 | Wiley et al. | Apr 2007 | B2 |
| 7213519 | Wiley et al. | May 2007 | B2 |
| 7231519 | Joseph et al. | Jun 2007 | B2 |
| 7232473 | Elliott | Jun 2007 | B2 |
| 7299750 | Schikora et al. | Nov 2007 | B2 |
| 7353756 | Leasure | Apr 2008 | B2 |
| 7380505 | Shiery | Jun 2008 | B1 |
| 7383776 | Amick | Jun 2008 | B2 |
| 7392746 | Hansen | Jul 2008 | B2 |
| 7426888 | Hunt | Sep 2008 | B2 |
| 7441504 | Husseini et al. | Oct 2008 | B2 |
| D583927 | Benner | Dec 2008 | S |
| 7458322 | Reynolds et al. | Dec 2008 | B2 |
| 7461597 | Brunn | Dec 2008 | B2 |
| 7568417 | Lee | Aug 2009 | B1 |
| 7585166 | Buja | Sep 2009 | B2 |
| 7610858 | Chung | Nov 2009 | B2 |
| 7750091 | Maljkovic et al. | Jul 2010 | B2 |
| D626619 | Gogol et al. | Nov 2010 | S |
| 7841279 | Reynolds et al. | Nov 2010 | B2 |
| D631699 | Moreau | Feb 2011 | S |
| D633166 | Richardson et al. | Feb 2011 | S |
| 7908972 | Brunn | Mar 2011 | B2 |
| 7930977 | Klein | Apr 2011 | B2 |
| 8007370 | Hirsch et al. | Aug 2011 | B2 |
| 8056232 | Patel et al. | Nov 2011 | B2 |
| 8156870 | South | Apr 2012 | B2 |
| 8186273 | Trivette | May 2012 | B2 |
| 8191480 | Mcaninch | Jun 2012 | B2 |
| 8201867 | Thomeczek | Jun 2012 | B2 |
| 8206522 | Sandstrom et al. | Jun 2012 | B2 |
| 8220393 | Schluckebier et al. | Jul 2012 | B2 |
| 8240252 | Maljkovic et al. | Aug 2012 | B2 |
| D675882 | Crockett | Feb 2013 | S |
| 8393273 | Weeks et al. | Mar 2013 | B2 |
| 8408137 | Battaglia | Apr 2013 | B2 |
| D683419 | Rebar | May 2013 | S |
| 8443729 | Mittelstaedt | May 2013 | B2 |
| 8443730 | Padgett | May 2013 | B2 |
| 8464641 | Se-Hong | Jun 2013 | B2 |
| 8511233 | Nilsson | Aug 2013 | B2 |
| D689975 | Carlson et al. | Sep 2013 | S |
| 8522684 | Davies et al. | Sep 2013 | B2 |
| 8540828 | Busky et al. | Sep 2013 | B2 |
| 8561543 | Burrow | Oct 2013 | B2 |
| 8573126 | Klein et al. | Nov 2013 | B2 |
| 8641842 | Hafner et al. | Feb 2014 | B2 |
| 8689696 | Seeman et al. | Apr 2014 | B1 |
| 8763535 | Padgett | Jul 2014 | B2 |
| 8790455 | Borissov et al. | Jul 2014 | B2 |
| 8807008 | Padgett et al. | Aug 2014 | B2 |
| 8807040 | Menefee, III | Aug 2014 | B2 |
| 8813650 | Maljkovic et al. | Aug 2014 | B2 |
| D715888 | Padgett | Oct 2014 | S |
| 8850985 | Maljkovic et al. | Oct 2014 | B2 |
| 8857343 | Marx | Oct 2014 | B2 |
| 8869702 | Padgett | Oct 2014 | B2 |
| D717909 | Thrift et al. | Nov 2014 | S |
| 8875633 | Padgett | Nov 2014 | B2 |
| 8893621 | Escobar | Nov 2014 | B1 |
| 8915191 | Jones | Dec 2014 | B2 |
| 8978559 | Davies et al. | Mar 2015 | B2 |
| 8985023 | Mason | Mar 2015 | B2 |
| 9003973 | Padgett | Apr 2015 | B1 |
| 9032855 | Foren et al. | May 2015 | B1 |
| 9091516 | Davies et al. | Jul 2015 | B2 |
| 9103641 | Nielson et al. | Aug 2015 | B2 |
| 9111177 | Tateno et al. | Aug 2015 | B2 |
| 9157709 | Nuetzman et al. | Oct 2015 | B2 |
| 9170080 | Poore et al. | Oct 2015 | B2 |
| 9182204 | Maljkovic et al. | Nov 2015 | B2 |
| 9188412 | Maljkovic et al. | Nov 2015 | B2 |
| 9200157 | El-Hibri et al. | Dec 2015 | B2 |
| 9200878 | Seecamp | Dec 2015 | B2 |
| 9200880 | Foren et al. | Dec 2015 | B1 |
| 9212876 | Kostka et al. | Dec 2015 | B1 |
| 9212879 | Whitworth | Dec 2015 | B2 |
| 9213175 | Arnold | Dec 2015 | B2 |
| 9254503 | Ward | Feb 2016 | B2 |
| 9255775 | Rubin | Feb 2016 | B1 |
| D752397 | Seiders et al. | Mar 2016 | S |
| 9273941 | Carlson et al. | Mar 2016 | B2 |
| D754223 | Pederson et al. | Apr 2016 | S |
| 9329004 | Pace | May 2016 | B2 |
| 9335137 | Maljkovic et al. | May 2016 | B2 |
| 9337278 | Gu et al. | May 2016 | B1 |
| 9347457 | Ahrens et al. | May 2016 | B2 |
| 9366512 | Burczynski et al. | Jun 2016 | B2 |
| 9372054 | Padgett | Jun 2016 | B2 |
| 9377278 | Rubin | Jun 2016 | B2 |
| 9389052 | Conroy et al. | Jul 2016 | B2 |
| 9395165 | Maljkovic et al. | Jul 2016 | B2 |
| D764624 | Masinelli | Aug 2016 | S |
| D765214 | Padgett | Aug 2016 | S |
| 9429407 | Burrow | Aug 2016 | B2 |
| 9441930 | Burrow | Sep 2016 | B2 |
| 9453714 | Bosarge et al. | Sep 2016 | B2 |
| D773009 | Bowers | Nov 2016 | S |
| 9500453 | Schluckebier et al. | Nov 2016 | B2 |
| 9506735 | Burrow | Nov 2016 | B1 |
| D774824 | Gallagher | Dec 2016 | S |
| 9513092 | Emary | Dec 2016 | B2 |
| 9513096 | Burrow | Dec 2016 | B2 |
| 9518810 | Burrow | Dec 2016 | B1 |
| 9523563 | Burrow | Dec 2016 | B1 |
| 9528799 | Maljkovic | Dec 2016 | B2 |
| 9546849 | Burrow | Jan 2017 | B2 |
| 9551557 | Burrow | Jan 2017 | B1 |
| D778391 | Burrow | Feb 2017 | S |
| D778393 | Burrow | Feb 2017 | S |
| D778394 | Burrow | Feb 2017 | S |
| D778395 | Burrow | Feb 2017 | S |
| D779021 | Burrow | Feb 2017 | S |
| D779024 | Burrow | Feb 2017 | S |
| D780283 | Burrow | Feb 2017 | S |
| 9587918 | Burrow | Mar 2017 | B1 |
| 9599443 | Padgett et al. | Mar 2017 | B2 |
| 9625241 | Neugebauer | Apr 2017 | B2 |
| 9631907 | Burrow | Apr 2017 | B2 |
| 9644930 | Burrow | May 2017 | B1 |
| 9658042 | Emary | May 2017 | B2 |
| 9683818 | Lemke et al. | Jun 2017 | B2 |
| D792200 | Baiz et al. | Jul 2017 | S |
| 9709368 | Mahnke | Jul 2017 | B2 |
| D797880 | Seecamp | Sep 2017 | S |
| 9759554 | Ng et al. | Sep 2017 | B2 |
| D800244 | Burczynski et al. | Oct 2017 | S |
| D800245 | Burczynski et al. | Oct 2017 | S |
| D800246 | Burczynski et al. | Oct 2017 | S |
| 9784667 | Lukay et al. | Oct 2017 | B2 |
| 9835423 | Burrow | Dec 2017 | B2 |
| 9835427 | Burrow | Dec 2017 | B2 |
| 9857151 | Dionne et al. | Jan 2018 | B2 |
| 9869536 | Burrow | Jan 2018 | B2 |
| 9879954 | Hajjar | Jan 2018 | B2 |
| 9885551 | Burrow | Feb 2018 | B2 |
| D813975 | White | Mar 2018 | S |
| 9921040 | Rubin | Mar 2018 | B2 |
| 9927219 | Burrow | Mar 2018 | B2 |
| 9933241 | Burrow | Apr 2018 | B2 |
| 9939236 | Drobockyi et al. | Apr 2018 | B2 |
| 9964388 | Burrow | May 2018 | B1 |
| D821536 | Christiansen et al. | Jun 2018 | S |
| 9989339 | Riess | Jun 2018 | B2 |
| 9989343 | Padgett et al. | Jun 2018 | B2 |
| 10041770 | Burrow | Aug 2018 | B2 |
| 10041771 | Burrow | Aug 2018 | B1 |
| 10041776 | Burrow | Aug 2018 | B1 |
| 10041777 | Burrow | Aug 2018 | B1 |
| 10048049 | Burrow | Aug 2018 | B2 |
| 10048050 | Burrow | Aug 2018 | B1 |
| 10048052 | Burrow | Aug 2018 | B2 |
| 10054413 | Burrow | Aug 2018 | B1 |
| D828483 | Burrow | Sep 2018 | S |
| 10081057 | Burrow | Sep 2018 | B2 |
| D832037 | Gallagher | Oct 2018 | S |
| 10101140 | Burrow | Oct 2018 | B2 |
| 10124343 | Tsai | Nov 2018 | B2 |
| 10145662 | Burrow | Dec 2018 | B2 |
| 10190857 | Burrow | Jan 2019 | B2 |
| 10234249 | Burrow | Mar 2019 | B2 |
| 10234253 | Burrow | Mar 2019 | B2 |
| 10240905 | Burrow | Mar 2019 | B2 |
| 10254096 | Burrow | Apr 2019 | B2 |
| 10260847 | Viggiano et al. | Apr 2019 | B2 |
| D849181 | Burrow | May 2019 | S |
| 10302403 | Burrow | May 2019 | B2 |
| 10302404 | Burrow | May 2019 | B2 |
| 10323918 | Menefee, III | Jun 2019 | B2 |
| 10330451 | Burrow | Jun 2019 | B2 |
| 10345088 | Burrow | Jul 2019 | B2 |
| 10352664 | Burrow | Jul 2019 | B2 |
| 10352670 | Burrow | Jul 2019 | B2 |
| 10359262 | Burrow | Jul 2019 | B2 |
| 10365074 | Burrow | Jul 2019 | B2 |
| D861118 | Burrow | Sep 2019 | S |
| D861119 | Burrow | Sep 2019 | S |
| 10408582 | Burrow | Sep 2019 | B2 |
| 10408592 | Boss et al. | Sep 2019 | B2 |
| 10415943 | Burrow | Sep 2019 | B2 |
| 10429156 | Burrow | Oct 2019 | B2 |
| 10458762 | Burrow | Oct 2019 | B2 |
| 10466020 | Burrow | Nov 2019 | B2 |
| 10466021 | Burrow | Nov 2019 | B2 |
| 10480911 | Burrow | Nov 2019 | B2 |
| 10480912 | Burrow | Nov 2019 | B2 |
| 10480915 | Burrow et al. | Nov 2019 | B2 |
| 10488165 | Burrow | Nov 2019 | B2 |
| 10533830 | Burrow et al. | Jan 2020 | B2 |
| 10571228 | Burrow | Feb 2020 | B2 |
| 10571229 | Burrow | Feb 2020 | B2 |
| 10571230 | Burrow | Feb 2020 | B2 |
| 10571231 | Burrow | Feb 2020 | B2 |
| 10578409 | Burrow | Mar 2020 | B2 |
| 10591260 | Burrow et al. | Mar 2020 | B2 |
| D882019 | Burrow et al. | Apr 2020 | S |
| D882020 | Burrow et al. | Apr 2020 | S |
| D882021 | Burrow et al. | Apr 2020 | S |
| D882022 | Burrow et al. | Apr 2020 | S |
| D882023 | Burrow et al. | Apr 2020 | S |
| D882024 | Burrow et al. | Apr 2020 | S |
| D882025 | Burrow et al. | Apr 2020 | S |
| D882026 | Burrow et al. | Apr 2020 | S |
| D882027 | Burrow et al. | Apr 2020 | S |
| D882028 | Burrow et al. | Apr 2020 | S |
| D882029 | Burrow et al. | Apr 2020 | S |
| D882030 | Burrow et al. | Apr 2020 | S |
| D882031 | Burrow et al. | Apr 2020 | S |
| D882032 | Burrow et al. | Apr 2020 | S |
| D882033 | Burrow et al. | Apr 2020 | S |
| D882720 | Burrow et al. | Apr 2020 | S |
| D882721 | Burrow et al. | Apr 2020 | S |
| D882722 | Burrow et al. | Apr 2020 | S |
| D882723 | Burrow et al. | Apr 2020 | S |
| D882724 | Burrow et al. | Apr 2020 | S |
| 10612896 | Burrow | Apr 2020 | B2 |
| 10612897 | Burrow et al. | Apr 2020 | B2 |
| D884115 | Burrow et al. | May 2020 | S |
| 10663271 | Rogers | May 2020 | B2 |
| D886231 | Burrow et al. | Jun 2020 | S |
| D886937 | Burrow et al. | Jun 2020 | S |
| 10677573 | Burrow et al. | Jun 2020 | B2 |
| D891567 | Burrow et al. | Jul 2020 | S |
| D891568 | Burrow et al. | Jul 2020 | S |
| D891569 | Burrow et al. | Jul 2020 | S |
| D891570 | Burrow et al. | Jul 2020 | S |
| 10704869 | Burrow et al. | Jul 2020 | B2 |
| 10704870 | Burrow et al. | Jul 2020 | B2 |
| 10704871 | Burrow et al. | Jul 2020 | B2 |
| 10704872 | Burrow et al. | Jul 2020 | B1 |
| 10704876 | Boss et al. | Jul 2020 | B2 |
| 10704877 | Boss et al. | Jul 2020 | B2 |
| 10704878 | Boss et al. | Jul 2020 | B2 |
| 10704879 | Burrow et al. | Jul 2020 | B1 |
| 10704880 | Burrow et al. | Jul 2020 | B1 |
| D892258 | Burrow et al. | Aug 2020 | S |
| D893665 | Burrow et al. | Aug 2020 | S |
| D893666 | Burrow et al. | Aug 2020 | S |
| D893667 | Burrow et al. | Aug 2020 | S |
| D893668 | Burrow et al. | Aug 2020 | S |
| D894320 | Burrow et al. | Aug 2020 | S |
| 10731956 | Burrow et al. | Aug 2020 | B2 |
| 10731957 | Burrow et al. | Aug 2020 | B1 |
| 10753713 | Burrow | Aug 2020 | B2 |
| 10760882 | Burrow | Sep 2020 | B1 |
| 10782107 | Dindl | Sep 2020 | B1 |
| 10794671 | Padgett et al. | Oct 2020 | B2 |
| 10809043 | Padgett et al. | Oct 2020 | B2 |
| D903038 | Burrow et al. | Nov 2020 | S |
| D903039 | Burrow et al. | Nov 2020 | S |
| 10845169 | Burrow | Nov 2020 | B2 |
| 10852108 | Burrow et al. | Dec 2020 | B2 |
| 10859352 | Burrow | Dec 2020 | B2 |
| 10871361 | Skowron et al. | Dec 2020 | B2 |
| 10876822 | Burrow et al. | Dec 2020 | B2 |
| 10900760 | Burrow | Jan 2021 | B2 |
| 10907944 | Burrow | Feb 2021 | B2 |
| 10914558 | Burrow | Feb 2021 | B2 |
| 10921100 | Burrow et al. | Feb 2021 | B2 |
| 10921101 | Burrow et al. | Feb 2021 | B2 |
| 10921106 | Burrow et al. | Feb 2021 | B2 |
| D913403 | Burrow et al. | Mar 2021 | S |
| 10948272 | Drobockyi et al. | Mar 2021 | B1 |
| 10948273 | Burrow et al. | Mar 2021 | B2 |
| 10948275 | Burrow | Mar 2021 | B2 |
| 10962338 | Burrow | Mar 2021 | B2 |
| 10976144 | Peterson et al. | Apr 2021 | B1 |
| 10996029 | Burrow | May 2021 | B2 |
| 10996030 | Burrow | May 2021 | B2 |
| 11047654 | Burrow | Jun 2021 | B1 |
| 11047655 | Burrow et al. | Jun 2021 | B2 |
| 11047661 | Burrow | Jun 2021 | B2 |
| 11047662 | Burrow | Jun 2021 | B2 |
| 11047663 | Burrow | Jun 2021 | B1 |
| 11047664 | Burrow | Jun 2021 | B2 |
| 11079205 | Burrow et al. | Aug 2021 | B2 |
| 11079209 | Burrow | Aug 2021 | B2 |
| 11085739 | Burrow | Aug 2021 | B2 |
| 11085740 | Burrow | Aug 2021 | B2 |
| 11085741 | Burrow | Aug 2021 | B2 |
| 11085742 | Burrow | Aug 2021 | B2 |
| 11092413 | Burrow | Aug 2021 | B2 |
| 11098990 | Burrow | Aug 2021 | B2 |
| 11098991 | Burrow | Aug 2021 | B2 |
| 11098992 | Burrow | Aug 2021 | B2 |
| 11098993 | Burrow | Aug 2021 | B2 |
| 11118882 | Burrow | Sep 2021 | B2 |
| 11125540 | Pennell | Sep 2021 | B2 |
| 20030127011 | Mackerell et al. | Jul 2003 | A1 |
| 20040074412 | Kightlinger | Apr 2004 | A1 |
| 20050257712 | Husseini et al. | Nov 2005 | A1 |
| 20060027125 | Brunn | Feb 2006 | A1 |
| 20060278116 | Hunt | Dec 2006 | A1 |
| 20060283345 | Feldman et al. | Dec 2006 | A1 |
| 20070056343 | Cremonesi | Mar 2007 | A1 |
| 20070181029 | Mcaninch | Aug 2007 | A1 |
| 20070214993 | Cerovic et al. | Sep 2007 | A1 |
| 20100234132 | Hirsch et al. | Sep 2010 | A1 |
| 20110179965 | Mason | Jul 2011 | A1 |
| 20120180685 | Se-Hong | Jul 2012 | A1 |
| 20120291655 | Jones | Nov 2012 | A1 |
| 20130014664 | Padgett | Jan 2013 | A1 |
| 20130076865 | Tateno et al. | Mar 2013 | A1 |
| 20130186294 | Davies et al. | Jul 2013 | A1 |
| 20130291711 | Mason | Nov 2013 | A1 |
| 20140075805 | LaRue | Mar 2014 | A1 |
| 20140260925 | Beach et al. | Sep 2014 | A1 |
| 20140261044 | Seecamp | Sep 2014 | A1 |
| 20140311332 | Carlson et al. | Oct 2014 | A1 |
| 20150226220 | Bevington | Aug 2015 | A1 |
| 20150268020 | Emary | Sep 2015 | A1 |
| 20160003589 | Burrow | Jan 2016 | A1 |
| 20160003590 | Burrow | Jan 2016 | A1 |
| 20160003593 | Burrow | Jan 2016 | A1 |
| 20160003594 | Burrow | Jan 2016 | A1 |
| 20160003595 | Burrow | Jan 2016 | A1 |
| 20160003596 | Burrow | Jan 2016 | A1 |
| 20160003597 | Burrow | Jan 2016 | A1 |
| 20160003601 | Burrow | Jan 2016 | A1 |
| 20160033241 | Burrow | Feb 2016 | A1 |
| 20160102030 | Coffey et al. | Apr 2016 | A1 |
| 20160146585 | Padgett | May 2016 | A1 |
| 20160216088 | Maljkovic et al. | Jul 2016 | A1 |
| 20160245626 | Drieling et al. | Aug 2016 | A1 |
| 20160349022 | Burrow | Dec 2016 | A1 |
| 20160349023 | Burrow | Dec 2016 | A1 |
| 20160349028 | Burrow | Dec 2016 | A1 |
| 20160356588 | Burrow | Dec 2016 | A1 |
| 20160377399 | Burrow | Dec 2016 | A1 |
| 20170030690 | Viggiano et al. | Feb 2017 | A1 |
| 20170080498 | Burrow | Mar 2017 | A1 |
| 20170082409 | Burrow | Mar 2017 | A1 |
| 20170082411 | Burrow | Mar 2017 | A1 |
| 20170089673 | Burrow | Mar 2017 | A1 |
| 20170089674 | Burrow | Mar 2017 | A1 |
| 20170089675 | Burrow | Mar 2017 | A1 |
| 20170089679 | Burrow | Mar 2017 | A1 |
| 20170153099 | Burrow | Jun 2017 | A9 |
| 20170205217 | Burrow | Jul 2017 | A9 |
| 20170299352 | Burrow | Oct 2017 | A9 |
| 20170328689 | Dindl | Nov 2017 | A1 |
| 20180066925 | Skowron et al. | Mar 2018 | A1 |
| 20180106581 | Rogers | Apr 2018 | A1 |
| 20180224252 | O'Rourke | Aug 2018 | A1 |
| 20180224253 | Burrow | Aug 2018 | A1 |
| 20180224256 | Burrow | Aug 2018 | A1 |
| 20180259310 | Burrow | Sep 2018 | A1 |
| 20180306558 | Padgett et al. | Oct 2018 | A1 |
| 20190011232 | Boss et al. | Jan 2019 | A1 |
| 20190011233 | Boss et al. | Jan 2019 | A1 |
| 20190011234 | Boss et al. | Jan 2019 | A1 |
| 20190011235 | Boss et al. | Jan 2019 | A1 |
| 20190011236 | Burrow | Jan 2019 | A1 |
| 20190011237 | Burrow | Jan 2019 | A1 |
| 20190011238 | Burrow | Jan 2019 | A1 |
| 20190011239 | Burrow | Jan 2019 | A1 |
| 20190011240 | Burrow | Jan 2019 | A1 |
| 20190011241 | Burrow | Jan 2019 | A1 |
| 20190025019 | Burrow | Jan 2019 | A1 |
| 20190025020 | Burrow | Jan 2019 | A1 |
| 20190025021 | Burrow | Jan 2019 | A1 |
| 20190025022 | Burrow | Jan 2019 | A1 |
| 20190025023 | Burrow | Jan 2019 | A1 |
| 20190025024 | Burrow | Jan 2019 | A1 |
| 20190025025 | Burrow | Jan 2019 | A1 |
| 20190025026 | Burrow | Jan 2019 | A1 |
| 20190025035 | Burrow | Jan 2019 | A1 |
| 20190025036 | Burrow | Jan 2019 | A1 |
| 20190078862 | Burrow | Mar 2019 | A1 |
| 20190106364 | James | Apr 2019 | A1 |
| 20190107375 | Burrow | Apr 2019 | A1 |
| 20190137228 | Burrow et al. | May 2019 | A1 |
| 20190137229 | Burrow et al. | May 2019 | A1 |
| 20190137230 | Burrow et al. | May 2019 | A1 |
| 20190137231 | Burrow et al. | May 2019 | A1 |
| 20190137232 | Burrow et al. | May 2019 | A1 |
| 20190137233 | Burrow et al. | May 2019 | A1 |
| 20190137234 | Burrow et al. | May 2019 | A1 |
| 20190137235 | Burrow et al. | May 2019 | A1 |
| 20190137236 | Burrow et al. | May 2019 | A1 |
| 20190137237 | Burrow et al. | May 2019 | A1 |
| 20190137238 | Burrow et al. | May 2019 | A1 |
| 20190137239 | Burrow et al. | May 2019 | A1 |
| 20190137240 | Burrow et al. | May 2019 | A1 |
| 20190137241 | Burrow et al. | May 2019 | A1 |
| 20190137242 | Burrow et al. | May 2019 | A1 |
| 20190137243 | Burrow et al. | May 2019 | A1 |
| 20190137244 | Burrow et al. | May 2019 | A1 |
| 20190170488 | Burrow | Jun 2019 | A1 |
| 20190204050 | Burrow | Jul 2019 | A1 |
| 20190204056 | Burrow | Jul 2019 | A1 |
| 20190212117 | Burrow | Jul 2019 | A1 |
| 20190242679 | Viggiano et al. | Aug 2019 | A1 |
| 20190242682 | Burrow | Aug 2019 | A1 |
| 20190242683 | Burrow | Aug 2019 | A1 |
| 20190249967 | Burrow et al. | Aug 2019 | A1 |
| 20190257625 | Burrow | Aug 2019 | A1 |
| 20190285391 | Menefee, III | Sep 2019 | A1 |
| 20190310058 | Burrow | Oct 2019 | A1 |
| 20190310059 | Burrow | Oct 2019 | A1 |
| 20190316886 | Burrow | Oct 2019 | A1 |
| 20190360788 | Burrow | Nov 2019 | A1 |
| 20190376773 | Burrow | Dec 2019 | A1 |
| 20190376774 | Boss et al. | Dec 2019 | A1 |
| 20190383590 | Burrow | Dec 2019 | A1 |
| 20200011645 | Burrow et al. | Jan 2020 | A1 |
| 20200011646 | Burrow et al. | Jan 2020 | A1 |
| 20200025536 | Burrow et al. | Jan 2020 | A1 |
| 20200025537 | Burrow et al. | Jan 2020 | A1 |
| 20200033102 | Burrow | Jan 2020 | A1 |
| 20200033103 | Burrow et al. | Jan 2020 | A1 |
| 20200041239 | Burrow | Feb 2020 | A1 |
| 20200049469 | Burrow | Feb 2020 | A1 |
| 20200049470 | Burrow | Feb 2020 | A1 |
| 20200049471 | Burrow | Feb 2020 | A1 |
| 20200049472 | Burrow | Feb 2020 | A1 |
| 20200049473 | Burrow | Feb 2020 | A1 |
| 20200056872 | Burrow | Feb 2020 | A1 |
| 20200109932 | Burrow | Apr 2020 | A1 |
| 20200149853 | Burrow | May 2020 | A1 |
| 20200158483 | Burrow | May 2020 | A1 |
| 20200200512 | Burrow | Jun 2020 | A1 |
| 20200200513 | Burrow | Jun 2020 | A1 |
| 20200208948 | Burrow | Jul 2020 | A1 |
| 20200208949 | Burrow | Jul 2020 | A1 |
| 20200208950 | Burrow | Jul 2020 | A1 |
| 20200225009 | Burrow | Jul 2020 | A1 |
| 20200248998 | Burrow | Aug 2020 | A1 |
| 20200248999 | Burrow | Aug 2020 | A1 |
| 20200249000 | Burrow | Aug 2020 | A1 |
| 20200256654 | Burrow | Aug 2020 | A1 |
| 20200263962 | Burrow et al. | Aug 2020 | A1 |
| 20200263967 | Burrow et al. | Aug 2020 | A1 |
| 20200278183 | Burrow et al. | Sep 2020 | A1 |
| 20200292283 | Burrow | Sep 2020 | A1 |
| 20200300587 | Burrow et al. | Sep 2020 | A1 |
| 20200300592 | Overton et al. | Sep 2020 | A1 |
| 20200309490 | Burrow et al. | Oct 2020 | A1 |
| 20200309496 | Burrow et al. | Oct 2020 | A1 |
| 20200326168 | Boss et al. | Oct 2020 | A1 |
| 20200363172 | Koh et al. | Nov 2020 | A1 |
| 20200363173 | Burrow | Nov 2020 | A1 |
| 20200363179 | Overton et al. | Nov 2020 | A1 |
| 20200378734 | Burrow | Dec 2020 | A1 |
| 20200393220 | Burrow | Dec 2020 | A1 |
| 20200400411 | Burrow | Dec 2020 | A9 |
| 20210003373 | Burrow | Jan 2021 | A1 |
| 20210041211 | Pennell | Feb 2021 | A1 |
| 20210041212 | Burrow et al. | Feb 2021 | A1 |
| 20210041213 | Padgett | Feb 2021 | A1 |
| 20210072006 | Padgett et al. | Mar 2021 | A1 |
| 20210080236 | Burrow | Mar 2021 | A1 |
| 20210080237 | Burrow et al. | Mar 2021 | A1 |
| 20210108898 | Overton et al. | Apr 2021 | A1 |
| 20210108899 | Burrow et al. | Apr 2021 | A1 |
| 20210123709 | Burrow et al. | Apr 2021 | A1 |
| 20210131772 | Burrow | May 2021 | A1 |
| 20210131773 | Burrow | May 2021 | A1 |
| 20210131774 | Burrow | May 2021 | A1 |
| 20210140749 | Burrow | May 2021 | A1 |
| 20210148681 | Burrow | May 2021 | A1 |
| 20210148682 | Burrow | May 2021 | A1 |
| 20210148683 | Burrow et al. | May 2021 | A1 |
| 20210156653 | Burrow et al. | May 2021 | A1 |
| 20210164762 | Burrow et al. | Jun 2021 | A1 |
| 20210254939 | Burrow | Aug 2021 | A1 |
| 20210254940 | Burrow | Aug 2021 | A1 |
| 20210254941 | Burrow | Aug 2021 | A1 |
| 20210254942 | Burrow | Aug 2021 | A1 |
| 20210254943 | Burrow | Aug 2021 | A1 |
| 20210254944 | Burrow | Aug 2021 | A1 |
| 20210254945 | Burrow | Aug 2021 | A1 |
| 20210254946 | Burrow | Aug 2021 | A1 |
| 20210254947 | Burrow | Aug 2021 | A1 |
| 20210254948 | Burrow | Aug 2021 | A1 |
| 20210254949 | Burrow | Aug 2021 | A1 |
| Number | Date | Country |
|---|---|---|
| 2813634 | Apr 2012 | CA |
| 102901403 | Jun 2014 | CN |
| 16742 | Jan 1882 | DE |
| 2625486 | Aug 2017 | EP |
| 1412414 | Oct 1965 | FR |
| 574877 | Jan 1946 | GB |
| 783023 | Sep 1957 | GB |
| 2172467 | Aug 2001 | RU |
| 0034732 | Jun 2000 | WO |
| 2007014024 | Feb 2007 | WO |
| 2012047615 | Apr 2012 | WO |
| 2012097320 | Jul 2012 | WO |
| 2012097317 | Nov 2012 | WO |
| 2013070250 | May 2013 | WO |
| 2013096848 | Jun 2013 | WO |
| 2014062256 | Apr 2014 | WO |
| 2016003817 | Jan 2016 | WO |
| 2019094544 | May 2019 | WO |
| 2019160742 | Aug 2019 | WO |
| 2021040903 | Mar 2021 | WO |
| Entry |
|---|
| International Search Report and Written Opinion in PCT/US2019/040323 dated Sep. 24, 2019, pp. 1-16. |
| International Search Report and Written Opinion in PCT/US2019/040329 dated Sep. 27, 2019, pp. 1-24. |
| International Search Report and Written Opinion for PCTUS201859748 dated Mar. 1, 2019, pp. 1-9. |
| International Search Report and Written Opinion for PCTUS2019017085 dated Apr. 19, 2019, pp. 1-9. |
| AccurateShooter.com Daily Bulletin “New PolyCase Ammunition and Injection-Molded Bullets” Jan. 11, 2015. |
| Korean Intellectual Property Office (ISA), International Search Report and Written Opinion for PCT/US2011/062781 dated Nov. 30, 2012, 16 pp. |
| Korean Intellectual Property Office (ISA), International Search Report and Written Opinion for PCT/US2015/038061 dated Sep. 21, 2015, 28 pages. |
| International Preliminary Report on Patentability and Written Opinion in PCT/US2018/059748 dated May 12, 2020; pp. 1-8. |
| IPRP in PCT2019017085 dated Aug. 27, 2020, pp. 1-8. |
| International Ammunition Association, Inc. website, published on Apr. 2017, PCP Ammo Variation in U.S. Military Polymer/Metal Cartridge Case R&D, Available on the Internet URL https://forum.cartridgecollectors.org/t/pcp-ammo-variation-in-u-s-military-polyer-metal-cartridge-case-r-d/24400. |
| Luck Gunner.com, Review: Polymer Cased Rifle Ammunition from PCP Ammo, Published Jan. 6, 2014, Available an the Internet URL https://www.luckygunner.com/lounge/pcp-ammo-review. |
| 7YouTube.com—TFB TV, Published on Jul. 23, 2015, available on Internal URL https://www.youtubecom/watch?V=mCjNkbxHkEE. |
| International Search Report and Written Opinion in PCT/US2020/023273 dated Oct. 7, 2020; pp. 1-11. |
| EESR dated Jul. 29, 2021, pp. 1-9. |
| EESR dated Jul. 8, 2021, pp. 1-9. |
| ISRWO in PCT/US2020/042258 dated Feb. 19, 2021, pp. 1-12. |
| Number | Date | Country | |
|---|---|---|---|
| 20190107375 A1 | Apr 2019 | US |
| Number | Date | Country | |
|---|---|---|---|
| 61456664 | Nov 2010 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 14751973 | Jun 2015 | US |
| Child | 16219215 | US | |
| Parent | 13292843 | Nov 2011 | US |
| Child | 14011202 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 14011202 | Aug 2013 | US |
| Child | 14751973 | US |
