The present invention relates to a dry cleaning method for cleaning fabric articles, wherein the articles are treated with a working cyclosiloxane dry cleaning solvent to remove contaminants from said articles, and wherein special measures are taken in case of an increased temperature event. The present invention also relates to a dry cleaning system for cleaning fabric articles suitable for applying the method of the invention, said system comprising a reservoir containing a working cyclosiloxane dry cleaning solvent, and a vessel for treating fabric articles. The system of the invention comprises, optionally, also a reclamation device for cleaning-up the used solvent formed during treatment of the fabric articles.
Preferably, the dry cleaning method and system of the invention are suitable for in-home use.
In general, fabric articles can be cleaned using water as the primary medium with, additionally, surfactants and other cleaning agents for enhancing the cleaning performance.
However, some laundry articles cannot be safely cleaned with water. For these, a dry cleaning process may be used wherein a cyclosiloxane dry cleaning solvent is the primary medium. Dry cleaning is, however, only available in specialised outlets and, usually, consumers have to bring and pick up their clothes, which is not convenient.
In this connection, some proposals have been made towards an in-home dry cleaning process, i.e. a dry cleaning process for relatively small wash loads suitable for use in domestic environments.
However, the use of organic cyclosiloxane dry cleaning solvent in domestic environments requires a more stringent approach regarding safety and ease of use.
Domestic environments are usually well adapted for aqueous washing; water is available from a tap and can be discharged to a sewer after washing. Evidently, this will be more complicated with cyclosiloxane dry cleaning solvents. Fresh solvent needs to be supplied to replenish lost solvent. The supply of fresh solvent will probably be carried out via cylinders which need to be purchased separately from time to time. Furthermore, for environmental and safety reasons the dry cleaning machine will probably have to be designed as a closed system. This is to retain substantially all of the solvent so as to minimise losses into the environment. In addition, the whole process of adding fresh solvent and collecting used solvent will also have to meet such stringent environmental and safety requirements.
Various dry cleaning systems are known in the art.
For instance, WO-A-01/94678 discloses fabric article treatment processes to be carried out in a domestic appliance, which may preferably include a washing step wherein a lipophilic cleaning fluid, such as a siloxane, is present as the predominant fluid. However, this document does not disclose appliances or machines that incorporate effective safety measures, in particular safety measures that reduce the risk involved when using lipophilic fluids having a flash point, such as cyclosiloxanes.
Another type of dry cleaning system is disclosed in WO-A-01/94675. This document describes a dry cleaning apparatus and method for fabric treatment, that are safe for a wide range of fabric articles, minimise shrinkage and wrinkling, and can be adapted to a cost-effective use in the consumer's home. In said method a lipophilic cleaning fluid is used, which can include linear and cyclic polysiloxanes, hydrocarbons and chlorinated hydrocarbons. Preferred lipophilic solvents are non-viscous, and include cyclic siloxanes having a boiling point at 760 mmHg of below 250° C.
However, it has been found to be less safe to use a non-viscous cyclosiloxane dry cleaning solvent under all circumstances. For practical reasons it is indeed desirable to use a non-viscous cyclosiloxane dry cleaning solvent having a viscosity of no more than about 5 cSt under normal operating conditions. Under high-risk conditions, however, it is less safe to operate a dry cleaning system comprising a solvent with a viscosity of no more than about 10 cSt.
Furthermore, US-A-2003/0226214 discloses a dry cleaning system containing a solvent filtration device and a method for using this system. The lipophilic solvent used herein is preferably inflammable. It is also preferred that said solvent has a relatively high flash point and/or a relatively low volatile organic compound (VOC) characteristic, whereby it is also mentioned in this document that suitable lipophilic fluids are readily flowable and non-viscous. However, it has been found that under high-risk conditions it is less safe to apply such a non-viscous and readily flowable fluid in a dry cleaning system.
In view of the foregoing, it is concluded that the dry cleaning systems of the prior art leave to be desired in that the solvent viscosity is generally such that in case of a spill the solvent could easily cover a large surface area in a residential home, possibly even covering multiple floors in the home.
In case of an increased temperature event, a rupture in the dry cleaning system could easily lead to spillage of the cyclosiloxane dry cleaning solvent, such as cyclosiloxane, which could considerably increase the risk of fire.
It is, therefore, an object of the present invention to provide a novel dry cleaning system that addresses one or more of the drawbacks mentioned above. More in particular, it is an object of the invention to provide a dry cleaning system that comprises elements for improving the safety of said system. It is also an object to find a safe dry cleaning method that can be carried out in said system.
It has now surprisingly been found that these objects can be achieved with the dry cleaning method and system of the present invention.
According to a first aspect, the present invention provides a method for cleaning fabric articles, comprising the step of treating the fabric articles with a working cyclosiloxane dry cleaning solvent to remove contaminants from the articles, wherein the working cyclosiloxane solvent is contacted and mixed with a solidifying catalyst in case of an increased temperature event.
According to a second aspect, the invention provides a a dry cleaning system for cleaning fabric articles suitable for applying the method of the invention, said system comprising:
The present invention provides a safe dry cleaning method and system, because under certain conditions of high risk (as a result of a high temperature event) the viscosity and flash-point of the cyclosiloxane dry cleaning solvent used in said system/method strongly increase. Furthermore, if the high temperature event would lead to a spillage of the solvent the surface area covered by said solvent will be considerably reduced owing to the strong viscosity increase.
As a consequence, the dry cleaning method and system of the invention are particularly suitable for use in domestic environments.
These and other aspects, features and advantages of the invention will become apparent to those of ordinary skill in the art from a reading of the following detailed description and the appended claims.
For avoidance of doubt, it is noted that the examples given in the description below are intended to clarify the invention and are not given to limit the invention to those examples per se. Other than in the examples, all numbers expressing quantities of ingredients or reaction conditions used herein are to be understood as modified in all instances by the term “about”, unless otherwise indicated. Similarly, all percentages are weight/weight percentages of the total composition unless otherwise indicated. Numerical ranges expressed in the format “from x to y” are understood to include x and y. When for a specific feature multiple preferred ranges are described in the format “from x to y”, it is understood that all ranges combining the different endpoints are also contemplated.
The term “dry cleaning process” used herein is intended to mean any process wherein laundry articles are contacted with a dry cleaning composition within a closable vessel. It is to be understood that this is also meant to encompass other fabric treatments such as but not limited to softening and refreshing. However, as used herein this term does not include any process comprising cycles wherein the fabric articles are also immersed and rinsed in an aqueous cleaning composition comprising more than 80% wt of water because this would usually damage garments that can only be dry cleaned.
The term “disposable treatment composition” is intended to mean a composition consisting of one or more surfactants and optionally other cleaning agents.
The term “cyclosiloxane dry cleaning solvent” as used herein is intended to encompass the “working cyclosiloxane dry cleaning solvent” and the “used cyclosiloxane dry cleaning solvent”. These are different forms taken on by the cyclosiloxane dry cleaning solvent as it passes through the present system or method during the cleaning and, optionally, the reclamation operation.
The term “dry cleaning composition” as used herein is intended to mean the composition used in the dry cleaning process including the cyclosiloxane dry cleaning solvent, a disposable treatment composition and, optionally, water, but excluding the fabric articles that are to be cleaned.
The term “normal operation” is intended to mean the operation of the dry cleaning system of the invention for the purpose of running a dry cleaning process for treatment of fabric articles.
On the other hand, the term “increased temperature event” is intended to mean the event occurring when the temperature of the environment surrounding the dry cleaning system or the temperature of the cyclosiloxane dry cleaning solvent used in said system exceeds the threshold temperature thereof. The threshold temperature of the solvent is equal to the flash point thereof. Examples of an increased temperature event are fire in the room where the dry cleaning system is located, and overheating of the cyclosiloxane dry cleaning solvent used in said system caused by failure of all temperature controls.
The term “barrier” is intended to mean a structure that separates the working and used cyclosiloxane dry cleaning solvent on the one hand from the solidifying agent and, optionally the cross-linking agent, on the other hand. Said barrier structure is closed under normal operation and is opened by an increased temperature event trigger upon which the separated components are contacted.
A suitable barrier for use in the present invention contains an element selected from a bi-metal, a membrane, a valve and a combination thereof.
The terms “fabric article” and “laundry article” as used herein are intended to mean a garment but may include any textile article. Textile articles include—but are not limited to—those made from natural fibres such as cotton, wool, linen, hemp, silk, and man-made fibres such as nylon, viscose, acetate, polyester, polyamide, polypropylene elastomer, natural or synthetic leather, natural or synthetic fur, and mixtures thereof.
Dry Cleaning Method
The dry cleaning method of the invention may comprise different cleaning and rinsing cycles in any order depending on the desired outcome. The number and length of the cycles may vary depending on the desired result.
For the purpose of the present invention, a rinse cycle is defined as a cycle wherein the laundry articles are agitated in cyclosiloxane dry cleaning solvent only. When surfactant and/or other cleaning agent is present, the cycle is described as a cleaning cycle whereby cleaning is understood to encompass conditioning.
A cycle wherein surfactant and, optionally, other cleaning agent is used will normally comprise of different steps such as mixing a disposable treatment composition with a cyclosiloxane dry cleaning solvent to form a dry cleaning composition, contacting a fabric article with said composition, removing said composition from the fabric article. The removal may be carried out by any means known in the art such as draining, spinning or, when appropriate, evaporating the composition.
Generally, fabric articles are cleaned by contacting a cleaning effective amount of a dry cleaning composition with said articles for an effective period of time to clean the articles or otherwise remove stains therefrom.
Each cleaning cycle may preferably last from at least 0.1 min, or more preferably at least 0.5 min, or still more preferably at least 1 min or even 5 min, and at most 2 hours, preferably at most 30 min, even more preferably at most 20 min. In some cases longer times may be desired, for example overnight.
Usually, the fabric article is immersed in the dry cleaning composition. The amount of dry cleaning composition used and the amount of time the composition is in contact with the article can vary based on the equipment and the number of articles being cleaned. Normally, the dry cleaning method of the invention will comprise at least one cycle of contacting the fabric article with a dry cleaning composition and at least one cycle of rinsing the article with a fresh load of cyclosiloxane dry cleaning solvent.
The mixing of the disposable treatment composition with a cyclosiloxane dry cleaning solvent to form a dry cleaning composition may be carried out by any means known in the art. Mixing may be carried out in a separate chamber or in a drum. Preferably, the disposable treatment composition is mixed with a cyclosiloxane dry cleaning solvent such that the surfactant and, optionally, the other cleaning agent, is effectively dispersed and/or dissolved to obtain the desired cleaning. Suitable mixing devices including pump assemblies or in-line static mixers, a centrifugal pump, a colloid mill or other type of mill, a rotary mixer, an ultrasonic mixer and other means for dispersing one liquid into another, non-miscible liquid can be used to provide effective agitation to cause emulsification.
Preferably, the dry cleaning method is carried out in an automated dry cleaning machine that comprises a closable vessel. Said machine is preferably closed or sealed in such a way that the cyclosiloxane dry cleaning solvent can be contained within the machine if needed. The closable vessel usually comprises a drum which can rotate inside said vessel.
The laundry articles in need of treatment are placed inside the drum wherein said articles are contacted with the dry cleaning composition. This may be done in any way known in the art such as spraying or even using a mist.
Normal Operation
The dry cleaning solvent applied in the method of the invention is a cyclosiloxane solvent. The performance of the dry cleaning step can be further improved by adding a disposable treatment composition the cyclosiloxane dry cleaning solvent, thus creating a dry cleaning composition. After the dry cleaning step of contacting a fabric article with said dry cleaning composition, the used dry cleaning composition is separated from the treated article. Subsequently, the treated fabric article is preferably rinsed in a rinse step by contacting said treated article with an amount of fresh cyclosiloxane dry cleaning solvent. The rinse step ends by separating the used rinse composition from the rinsed fabric article. After the dry cleaning step or the last rinse step whichever is last, the treated or rinsed fabric article is suitably dried by contacting the article with solvent-unsaturated air.
Preferably, the air is heated up to a temperature within the constraints of safe operation of the dry cleaning method of the invention, normally being at least 30° F. below the flash point of the solvent.
After the dry cleaning step, the rinse step and the drying step the separated compositions containing the used cyclosiloxane dry cleaning solvent are preferably transported to a reclamation device where the cyclosiloxane dry cleaning solvent is cleaned up. During said cleaning-up process soils and detergent ingredients are separated from the used cyclosiloxane dry cleaning solvent, resulting in fresh cyclosiloxane dry cleaning solvent for re-use in the method of the invention, particularly the dry cleaning step or the rinse step.
Increased Temperature Event
In case of an increased temperature event the cyclosiloxane dry cleaning solvent is contacted and mixed with a solidifying catalyst and, optionally, with a cross-linking agent, preferably by adding or injecting said catalyst and optionally said agent into the solvent.
As a result, the viscosity and flash point of the solvent are drastically increased.
Beforehand, all cyclosiloxane dry cleaning solvent present in the system can be optionally transported to at least one of the reservoirs for containing the cyclosiloxane dry cleaning solvent.
In case a cross-linking agent is added, the solidifying catalyst and the agent may be added in any order. It is preferred that in between the additions of the catalyst respectively the cross-linking agent the resulting mixture is kept well mixed. It is also preferred that the cross-linking agent be added first to the dry cleaning composition, followed by mixing of the resulting composition, subsequent addition of the catalyst, and again followed by mixing.
Preferably, in case of an increased temperature event the following steps are consecutively triggered:
The cyclosiloxane dry cleaning solvent used in the method of the invention is preferably a cyclic siloxane solvent having a boiling point at 760 mmHg of below about 250° C. This preferred solvent is readily flowable and non-viscous under normal use. Specifically preferred cyclic siloxanes for use in the present invention are octamethyl cyclotetrasiloxane (D4, tetramer), decamethyl cyclopentasiloxane (D5, pentamer), and dodecamethyl cyclohexasiloxane (D6, hexamer). Most preferably, the cyclic siloxane comprises pentamer (D5), and is substantially free of tetramer (D4) and hexamer (D6).
Substantially free means in this connection, that the concentration of D4 and D6 is at most 1% wt of the total mass of cyclosiloxane solvent.
A reclamation process and device are preferably used to clean up the used solvent after a dry cleaning process, for re-use. The capacity of the reclamation process is desirably such that at least part of the used solvent, preferably all, is cleaned up before a new dry cleaning cycle is initiated by the user. Under certain conditions it can be expected that not all used solvent is cleaned-up when the user starts a new dry cleaning cycle, e.g. when one cycle immediately follows the previous one. In view of this, it is preferred to fill the dry cleaning system of the invention with more solvent than needed for one dry cleaning cycle. In this connection, an effective amount of cyclosiloxane solvent is defined to be an amount that is sufficient to run multiple dry cleaning cycles without being hampered by the reclamation capacity of the dry cleaning system.
Preferably, an effective total amount of cyclosiloxane solvent for use in the method of the invention is between 10 kg and 150 kg depending on the load of fabric articles to be cleaned. In other words, said solvent is preferably used in a total amount of 2 to 20 kg per kg wash load to be treated.
Solidifying Catalyst
Non-limiting examples of solidifying catalysts which are suitable for use in the present invention, are:
Preferred solidifying catalysts are strong alkali hydroxides, alkali metal hydroxides, alkali metal alkoxides, alkali metal silanolates, quaternary ammonium hydroxides, sodium hydroxide, potassium hydroxide, cesium hydroxide, rubidium hydroxide, lithium hydroxide, magnesium hydroxide, calcium hydroxide, strontium hydroxide and barium hydroxide, potassium methoxide, potassium oxide, potassium amide, tetramethylammonium methoxide, tetramethylammonium hydroxide, tetrabutylphosphonium silanolate, rubidium carbonate, cesium carbonate, rubidium carbonate, cesium carbonate, rubidium carboxylates, cesium carboxylate, mixtures of alcohols and alkoxides of potassium or sodium (where the alkyl radical has 1-5 carbon atoms, and the mol ratio of alcohol and alkoxide is between 0.5 and 2.5), phosphonitrilic chloride solution (which is obtained from the reaction of two moles of phosphorous pentachloride and one mole of ammonium chloride), phosphazene hydroxide, phosphazene fluoride. More preferably, the solidifying catalyst is cesium hydroxide or phosphazene hydroxide.
Specially preferred solidifying catalysts are phosphazene bases. The phosphazene base reacts with trace quantities of water present to form highly active hydroxide ions which initiate the polymerisation. The phosphazene base will also react with certain other chemical groups which may be present, e.g. silanol or alcohol, to form similarly active polymerisation-initiating species. The phosphazene base may be in ionic form, with a strong anion such as fluoride or hydroxide, which is active in initiating polymerisation.
In principle, any phosphazene base is suitable for use in the present invention. Phosphazene bases have the following core structure P═N—P═N, in which free N valences are linked to hydrogen, hydrocarbon, —P═N or ═P—N, and free P valences are linked to —N or ═N. Some phosphazene bases are commercially available from Fluka Chemie AG, Switzerland. The phosphazene bases preferably have at least 3 P-atoms. Some preferred phosphazene bases are the following general formulae:
((R1R2N)3P═N—)x(R1R2N)3-xP═NR3
[((R1R2N)3P═N—)x(R1R2N)3-xP—N(H)R3]+[A]−
[((R1R2N)3P═N—)y(R1R2N)4-yP]+[A]−
[(R1R2N)3P═N—(P(NR1R2)2═N)z—P+(NR1R2)3][A]−
where R1 and R2 are each independently selected from the group consisting of hydrogen and an optionally substituted hydrocarbon group, preferably a C1-C4 alkyl group, or in which R1 and R2 together form a heterocyclic ring, preferably a 5- or 6-membered ring; R3 is hydrogen or an optionally substituted hydrocarbon group, preferably a C1-C20 alkyl group, more preferably a C1-C10 alkyl group; x is 1, 2 or 3, preferably 2 or 3; y is 1, 2, 3 or 4, preferably 2, 3 or 4; z is an integer of from 1 to 10, preferably 1, 2, or 3; and A is an anion, preferably fluoride, hydroxide, silanolate, alkoxide, carbonate or bicarbonate. In particularly preferred compounds, R1 and R2 are methyl, R3 is tert. butyl or tert. octyl, x is 3, y is 4 and A is fluoride or hydroxide. A preferred phosphazene base is phosphazene base-P4-t-bu.
Preferred cationic catalysts comprise a porous, inorganic mineral particulate support, said porous support being coated with a film of polymeric material comprising pendant sulfonic or phosphonic acid functions (preferred particle diameter is 4 mm-5 mm, preferred specific surface area is 5-500 m2/g, preferred average pore diameter of the porous mineral support is 20-3000 Angstrom, and preferred porosity of the porous mineral support is 0.2 to 1.5 ml/g). Examples of other preferred acidic solidifying catalysts are sulphuric acid, sulphonic acid, hydrochloric acid, phosphonitrile halides (sometimes referred to as acidic phosphazenes).
The solidifying catalyst suitable for use in the present invention could be in the form of a liquid. Alternatively, it could be in the form of particulates (10-1000 μm), which could be coated with a cyclosiloxane-wetting film to enhance mixing of the particulates in the amount of cyclosiloxane.
An effective amount of solidifying agent is sufficient to solidify the cyclosiloxane dry cleaning solvent (which is desirably a cyclosiloxane solvent). Preferably, the concentration of solidifying catalyst is between 1 ppm and 10000 ppm by weight based on the total weight of cyclosiloxane dry cleaning solvent applied, more preferably between 3 ppm and 5000 ppm, even more preferably between 5 ppm and 3000 ppm, most preferably between 10 ppm and 1000 ppm.
Cross-Linking Agents
Generally, an effective cross-linking agent for use in the present invention may be a branched silicone based compound comprising at least 1 silicium atom and at least 3 oxygen atoms covalently bonded to said silicium atom.
More in particular, an effective cross-linking agent may be a branched silicone-based compound having the general formula:
(R1O)(R2O)(R3O)Si—(O—Si(OR4)(OR5))xOR6,
wherein R1, R2, R3, R4, R5, and R6 are preferably an alkyl or a siloxane radical, preferably CnH2n+1, wherein n is preferably between 1 and 5, more preferably n is 1 or 2. Preferably, x is less than 50, more preferably less than 20 and most preferably less than 10, but at least 0. The viscosity of an effective cross-linking agent is preferably less than 15 cSt, more preferably less than 10 cSt, most preferably less than 7 cSt. Examples of preferred cross-linking agents are tetraethoxysilane (Si(OC2H5)4), poly(diethoxysiloxane), and poly(dimethoxysiloxane).
An effective amount of cross-linking agent is sufficient to cross-link at least 3 silicone radicals. Preferably, the concentration of the cross-linking agent is between 0.05% and 10%, more preferably between 0.1 and 5%, even more preferably 0.1 to 3%, most preferably from 0.2 to 2% by weight, based on the total amount of the cyclosiloxane dry cleaning solvent applied in the method of the invention.
Dry Cleaning System
The dry cleaning system of the invention comprises a reservoir containing the working cyclosiloxane dry cleaning solvent, and a vessel for treating fabric articles, whereby said vessel is operatively connected to the reservoir, such that, in use, the working solvent comes into contact with the fabric articles in the vessel and removes contaminants therefrom.
The system also contains at least one compartment containing the solidifying catalyst and, optionally, a compartment containing the cross-linking agent, which are located adjacent to the reservoir for the solvent or the vessel, and separated therefrom by means of a barrier which opens in case of an increased temperature event.
Preferably, the system of the invention further comprises a reclamation device for cleaning-up the used solvent formed during of the fabric articles in the vessel. When present, this reclamation device is operatively connected with the vessel such that it comes into contact with the used solvent during operation of the system.
It is also desirable that the reclamation device is operatively connected to the reservoir for the working cyclosiloxane dry cleaning solvent such that the cleaned-up solvent can be re-used for treating the fabric articles.
Furthermore, when a reclamation device is present it is preferred that the system further comprises a reservoir for the used solvent which is operatively connected to the vessel and said reclamation device. In such case, it is also preferred that the compartment containing the solidifying catalyst, and, optionally, the compartment containing the cross-linking agent, are located adjacent to the vessel, the reservoir for the working solvent and/or the reservoir for the used solvent, and that these compartments are separated therefrom by means of a barrier which opens in case of an increased temperature event.
In view of all these safety measures, the dry cleaning system of the invention is desirably suitable for in-home use.
The present invention is illustrated by
In normal use, the dry cleaning systems shown in both
It follows that during normal operation cyclosiloxane solvent is present in reservoirs (C) and (D), and in vessel (A). Other examples of containers/locations where cyclosiloxane solvent may be present are optional storage tanks, piping (not shown in detail in the Figures) and the sealed outer casing of the total dry cleaning system (F).
The system shown in
The system shown in
In the preferred embodiment shown in
In case of an increased temperature event, first all cyclosiloxane solvent present in the system is transported to vessel (A). This transportation may be carried out by pumping, by gravitational forces, or by any other suitable method of transportation (not shown in
This can be done e.g. by rotating drum (B) and/or by purging this material with inert gas (such as nitrogen).
When present, this inert gas is stored in a compartment at the bottom side of the vessel (A) (not shown in
In the embodiment of
Subsequently, the barriers (2a), (4a) and (6a) are opened, which results in mixing of the solvent with the solidifying catalyst and the cross-linking agent.
Similarly as in the embodiment of
Furthermore, a barrier is present containing a bi-metal lid (G), a hinge (K) and a spring (L). Since the top part of the bi-metal lid (G) expands more than the bottom part thereof as a result of a temperature increase, the shown barrier configuration will open in case of an increased temperature event.
The present invention is illustrated by the following non-limiting examples.
A 100 ml beaker glass (diameter: 5 cm) was filled with 50 g cyclosiloxane solvent (i.e. decamethylcyclopentasiloxane, ex Dow Corning) and a magnetic stirrer bar (length 2 cm) was added. Subsequently, the beaker glass was heated up to 75° C. and well mixed by placing it on a combined heater and magnetic stirrer (IKA RCT Basic). Then, varying amounts of first a cross-linking agent (tetraethoxysilane, ex Aldrich) and subsequently a solidifying catalyst (Phosphazene base-P4-t-bu, ex Fluka) were added. After addition of both the agent and the catalyst the contents of the beaker glass were stirred.
In the table below, the tested compositions and times to solidify these compositions are shown, whereby the indicated levels of catalyst and agent are based on the weight of the solvent present:
(1)Reflects the time between the moment immediately after the catalyst has been added and the moment the composition has solidified (when the stirrer bar has stopped stirring due to high viscosity).
There is a clear relation between the time to solidify and on the other hand the level of solidifying catalyst and cross-linking agent in the cyclosiloxane solvent. As shown in the above table, the time to solidify the composition becomes shorter with increasing levels of the catalyst, at lower levels of cross-linking agent
Number | Date | Country | Kind |
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04076305.4 | Apr 2004 | EP | regional |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/EP2005/003916 | 4/12/2005 | WO | 00 | 9/8/2008 |
Publishing Document | Publishing Date | Country | Kind |
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WO2005/106105 | 11/10/2005 | WO | A |
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