Walter J. Schrenk

Person

Midland, MI, US

People

Patents Grantslast 30 patents

Information Patent Grant
Birefringent interference polarization
- Patent number 6,583,930
- Issue date Jun 24, 2003
- 3M Innovative Properties
- Walter J. Schrenk
- G02 - OPTICS
Information Patent Grant
Birefringent interference polarizer
- Patent number 5,872,653
- Issue date Feb 16, 1999
- Minnesota Mining and Manufacturing Company
- Walter J. Schrenk
- B32 - LAYERED PRODUCTS
Information Patent Grant
Method and apparatus for producing multilayer plastic articles
- Patent number 5,628,950
- Issue date May 13, 1997
- The Dow Chemical Company
- Walter J. Schrenk
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Birefringent interference polarizer
- Patent number 5,612,820
- Issue date Mar 18, 1997
- The Dow Chemical Company
- Walter J. Schrenk
- B32 - LAYERED PRODUCTS
Information Patent Grant
Formable reflective multilayer body
- Patent number 5,568,316
- Issue date Oct 22, 1996
- The Dow Chemical Company
- Walter J. Schrenk
- G02 - OPTICS
Information Patent Grant
All-polymeric ultraviolet light reflecting film
- Patent number 5,540,978
- Issue date Jul 30, 1996
- The Dow Chemical Compny
- Walter J. Schrenk
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Method for producing blow molded multilayer plastic articles
- Patent number 5,540,878
- Issue date Jul 30, 1996
- The Dow Chemical Company
- Walter J. Schrenk
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Birefringent interference polarizer
- Patent number 5,486,949
- Issue date Jan 23, 1996
- The Dow Chemical Company
- Walter J. Schrenk
- B32 - LAYERED PRODUCTS
Information Patent Grant
Formable reflective multilayer body
- Patent number 5,448,404
- Issue date Sep 5, 1995
- The Dow Chemical Company
- Walter J. Schrenk
- G02 - OPTICS
Information Patent Grant
Layer thickness gradient control in multilayer polymeric bodies
- Patent number 5,389,324
- Issue date Feb 14, 1995
- The Dow Chemical Company
- Ray A. Lewis
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Method and apparatus for producing multilayer plastic articles
- Patent number 5,380,479
- Issue date Jan 10, 1995
- The Dow Chemical Company
- Walter J. Schrenk
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Two component infrared reflecting film
- Patent number 5,360,659
- Issue date Nov 1, 1994
- The Dow Chemical Company
- Charles B. Arends
- B32 - LAYERED PRODUCTS
Information Patent Grant
Method of producing a lamellar polymeric body
- Patent number 5,316,703
- Issue date May 31, 1994
- The Dow Chemical Company
- Walter J. Schrenk
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Infrared reflective optical interference film
- Patent number RE34605
- Issue date May 10, 1994
- The Dow Chemical Company
- Walter J. Schrenk
- 359 - Optical: systems and elements
Information Patent Grant
Optically dissimilar composition for polymeric reflective bodies
- Patent number 5,278,694
- Issue date Jan 11, 1994
- The Dow Chemical Company
- John A. Wheatley
- B32 - LAYERED PRODUCTS
Information Patent Grant
Coextrusion of multilayer articles using protective boundary layers...
- Patent number 5,269,995
- Issue date Dec 14, 1993
- The Dow Chemical Company
- Ravi Ramanathan
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Multicomponent, multilayer polymeric reflective bodies
- Patent number 5,262,894
- Issue date Nov 16, 1993
- The Dow Chemical Company
- John A. Wheatley
- B32 - LAYERED PRODUCTS
Information Patent Grant
Multilayer polymeric reflective bodies for decorative and security...
- Patent number 5,234,729
- Issue date Aug 10, 1993
- The Dow Chemical Company
- John A. Wheatley
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Visibly transparent infrared reflecting film with color masking
- Patent number 5,233,465
- Issue date Aug 3, 1993
- The Dow Chemical Company
- John A. Wheatley
- G02 - OPTICS
Information Patent Grant
Lamellar polymeric body
- Patent number 5,217,794
- Issue date Jun 8, 1993
- The Dow Chemical Company
- Walter J. Schrenk
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Method for producing injection molded multilayer articles
- Patent number 5,202,074
- Issue date Apr 13, 1993
- The Dow Chemical Company
- Walter J. Schrenk
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Multilayer film for tamper indication by use of optical interferenc...
- Patent number 5,149,578
- Issue date Sep 22, 1992
- The Dow Chemical Company
- John A. Wheatley
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
Information Patent Grant
Polymeric reflective bodies with multiple layer types
- Patent number 5,126,880
- Issue date Jun 30, 1992
- The Dow Chemical Company
- John A. Wheatley
- B32 - LAYERED PRODUCTS
Information Patent Grant
Relective polymeric body
- Patent number 5,122,905
- Issue date Jun 16, 1992
- The Dow Chemical Company
- John A. Wheatley
- B32 - LAYERED PRODUCTS
Information Patent Grant
Infrared reflective optical interference film
- Patent number 5,103,337
- Issue date Apr 7, 1992
- The Dow Chemical Company
- Walter J. Schrenk
- G02 - OPTICS
Information Patent Grant
Methods and apparatus for generating interfacial surfaces
- Patent number 5,094,793
- Issue date Mar 10, 1992
- The Dow Chemical Company
- Walter J. Schrenk
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Multilayer film indicator for determining the integrity or authenti...
- Patent number 5,095,210
- Issue date Mar 10, 1992
- The Dow Chemical Company
- John A. Wheatley
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Interfacial surface generator
- Patent number 5,094,788
- Issue date Mar 10, 1992
- The Dow Chemical Company
- Walter J. Schrenk
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Elastomeric optical interference films
- Patent number 4,937,134
- Issue date Jun 26, 1990
- The Dow Chemical Company
- Walter J. Schrenk
- B32 - LAYERED PRODUCTS
Information Patent Grant
Method of making a polymeric optical waveguide by coextrusion
- Patent number 4,871,487
- Issue date Oct 3, 1989
- The Dow Chemical Company
- Larry J. Laursen
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

Patents Applicationslast 30 patents

Information Patent Application
Polymeric interference film
- Publication number 20010046086
- Publication date Nov 29, 2001
- 3M Innovative Properties Company
- John A. Wheatley
- G02 - OPTICS

Walter J. Schrenk

Person

Patents Grantslast 30 patents

Birefringent interference polarization

Birefringent interference polarizer

Method and apparatus for producing multilayer plastic articles

Birefringent interference polarizer

Formable reflective multilayer body

All-polymeric ultraviolet light reflecting film

Method for producing blow molded multilayer plastic articles

Birefringent interference polarizer

Formable reflective multilayer body

Layer thickness gradient control in multilayer polymeric bodies

Method and apparatus for producing multilayer plastic articles

Two component infrared reflecting film

Method of producing a lamellar polymeric body

Infrared reflective optical interference film

Optically dissimilar composition for polymeric reflective bodies

Coextrusion of multilayer articles using protective boundary layers...

Multicomponent, multilayer polymeric reflective bodies

Multilayer polymeric reflective bodies for decorative and security...

Visibly transparent infrared reflecting film with color masking

Lamellar polymeric body

Method for producing injection molded multilayer articles

Multilayer film for tamper indication by use of optical interferenc...

Polymeric reflective bodies with multiple layer types

Relective polymeric body

Infrared reflective optical interference film

Methods and apparatus for generating interfacial surfaces

Multilayer film indicator for determining the integrity or authenti...

Interfacial surface generator

Elastomeric optical interference films

Method of making a polymeric optical waveguide by coextrusion

Patents Applicationslast 30 patents

Polymeric interference film