EP1601754B1 - Wasserlösliches abgabeprodukt - Google Patents

Wasserlösliches abgabeprodukt Download PDF

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Publication number
EP1601754B1
EP1601754B1 EP04709220A EP04709220A EP1601754B1 EP 1601754 B1 EP1601754 B1 EP 1601754B1 EP 04709220 A EP04709220 A EP 04709220A EP 04709220 A EP04709220 A EP 04709220A EP 1601754 B1 EP1601754 B1 EP 1601754B1
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EP
European Patent Office
Prior art keywords
capsule
delivery product
product according
sheet
body portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP04709220A
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English (en)
French (fr)
Other versions
EP1601754A1 (de
Inventor
Cornelis B. Unilever R & D Vlaardingen DONKER
Vidyadhar S. Unilever R & D Vlaardingen RANADE
H. A. H. M. Unilever R & D Vlaardingen REBERS
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unilever PLC
Unilever NV
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Unilever PLC
Unilever NV
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Publication date
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Publication of EP1601754A1 publication Critical patent/EP1601754A1/de
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Publication of EP1601754B1 publication Critical patent/EP1601754B1/de
Anticipated expiration legal-status Critical
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D17/00—Detergent materials or soaps characterised by their shape or physical properties
    • C11D17/04—Detergent materials or soaps characterised by their shape or physical properties combined with or containing other objects
    • C11D17/041—Compositions releasably affixed on a substrate or incorporated into a dispensing means
    • C11D17/042—Water soluble or water disintegrable containers or substrates containing cleaning compositions or additives for cleaning compositions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/32—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging two or more different materials which must be maintained separate prior to use in admixture
    • B65D81/3216—Rigid containers disposed one within the other

Definitions

  • the invention relates to a water soluble delivery product comprising outer and inner water soluble capsules containing respective first and second fluid substances for release on dissolution of the capsules.
  • Detergent compositions for machine washing of laundry and dishes, crockery etc are provided in many forms such as free-flowing powders, liquids, etc.. Detergents in the form of compressed powder tablets are also commonly available. These are advantageous in that they do not require measuring they are thus easier to handle and dispense into the wash load and allow for accurate dosing in detergent.
  • Water-soluble capsules generally comprise a detergent composition encapsulated with water-soluble film, such as polyvinyl alcohol. Encapsulation allows for handling of the product without direct contact with the detergent composition. This is especially advantageous when the detergent composition includes aggressive cleaning components which would irritate the skin on direct contact.
  • a delivery product for delivery of a predetermined amount of first and second fluids, the product comprising an outer water soluble capsule containing a first fluid substance for release on dissolution of the outer capsule and an inner capsule containing a second fluid substance for release on dissolution of the inner capsule; wherein the inner capsule is spherical.
  • the provision of a spherical inner capsule has many advantages.
  • the spherical shape which offers minimal/no pointed portions, serves to reduce abrasion of the outer capsule as the inner capsules rubs against it, e.g. during packing, transportation or handling by the user.
  • the inner capsule preferably has minimal or preferably no external seals which could otherwise increase interference between the capsule during packing, transportation or handling and so lead to leakage.
  • a spherical inner capsule also provides a high volume to surface area ratio, which reduces the usage of capsule material and reduces after-use residues because of low seal area.
  • the outer capsule has a dome shaped body portion for containing the substance comprising a first sheet of a water soluble material thermoformed to form a body wall of the body portion, and a second sheet of water soluble material superposed on the first sheet and sealed thereto along a continuous region of the superposed sheets to form a base wall of the body portion.
  • This formation provides for a more robust outer capsule, and reduction in leaking.
  • sheet is intended to include both monolayer or multilayer constructions;
  • fluid is intended to include any flowable material, e.g. any particulate matter (powders,agglomerates), liquid, gel,paste and the like;
  • substantially spherical is intended to also include asymmetrical shaped capsules with slightly elliptical formations as well as symmetrical regular spheres.
  • the outer capsule may also have a gas entrapped within it.
  • the volume of gas bubble(s) in the outer capsule could be from 5-35% of the total volume of outer capsule.
  • This air bubble serves as a cushion for the inner capsule in that it reduces compression forces that are transmitted to the inner capsule from the outer capsule.
  • the entrapped gas is air.
  • the dome shaped outer capsule is preferably substantially spherical in shape.
  • the combination of thermoforming the capsules of the invention and forming the capsules into a substantially spherical dome shape together with the provision of a spherical inner capsule confers surprising advantages on the capsules of the invention.
  • a substantially spherical dome offers sufficient width within the dome to put a spherical inner capsule in it as compared to say a rectangular dome having same volume as the said spherical dome. Also, since the average distance of walls of outer dome to walls of inner capsule is less for a spherical dome rather than a rectangular dome, the inside capsule is more visible.
  • the maximum height of the body wall above the base wall is preferably less than or equal to the maximum width of the base wall.
  • the base wall is preferably generally circular but other dome shaped body portions according to the invention are envisaged. For example, dome shapes having rectangular, oval, square and triangular bases are envisaged.
  • the base of the dome may be substantially flat. Alternatively, the base may be somewhat concave or convex. In any case the resulting capsule is aysmmetrical about the base wall, although of course there can be one or more planes of symmetry perpendicular to the base wall.
  • the water soluble film is thermoformable and, in one embodiment of the invention, is polyvinyl alcohol, or a polyvinyl alcohol derivative.
  • the water soluble film of the base wall is the same material as that used to make the body wall. It is important that the body wall be thermoformed rather than cold formed because applicants have discovered that cold forming stresses the film and weakens the end capsule as a result.
  • the film has a thickness of between 10 and 1000 microns. More preferably the film has a thickness of between 20 and 80 microns.
  • the substance contained within the capsule may be a liquid, a gel or a paste.
  • the liquid may have a viscosity between 100 and 45000 centipoise, more preferably between 200 and 30000 centipoise.
  • a relatively 'thin' liquid allows the inner capsule to move more freely within the outer capsule.
  • the viscosity may be between 500 and 700 centipoise, and most preferably about 600 centipoise, when measured at 20°C at shear rate of 20 s -1 .
  • a thickened liquid/gel may be used.
  • solid particulate matter e.g. wax encapsulated ingredients (bleach) may be homogenously suspended throughout the body of the liquid/gel providing a pleasing visual appearance.
  • the substance is present in an amount of between 10 and 500ml, preferably between 10 and 100 ml, most preferably between 10 and 50 ml.
  • the capsule contains between 20 and 30 ml of a fluid composition.
  • the fluid composition is a laundry treatment agent such as a laundry detergent, fabric conditioner or fabric care formulation.
  • a laundry treatment agent such as a laundry detergent, fabric conditioner or fabric care formulation.
  • other compositions for domestic consumer use may be envisaged, such as disinfectants, personal care products, and the like.
  • composition is substantially non-aqueous, comprising less than 80% water.
  • the inner spherical capsule may be formed from any of the above mentioned materials as used to make the outer capsule. It may be formed by any suitable technology, e.g. as described in WO97/35537, WO00/27367 or WO01/03676 by Bio Progress Technology.
  • the invention also relates to a process for producing a capsule according to the invention, the process comprising the steps of:
  • the second sheet is superposed over the first sheet such that a small amount of air is entrapped in the outer capsule.
  • the spherical inner capsule might be dosed before placing the fluid in the outer capsule.
  • the first sheet of water-soluble material is thermoformed by means of a heating plate.
  • the sheet of water-soluble material intimately contacts the heating plate, typically by applying a vacuum between the heating plate and the sheet of water-soluble material.
  • the vacuum applied will be of less than 0.6 Bar.
  • the sheet may be blown into contact with the heating plate.
  • the thermoforming sheet can be blown or sucked off the heating plate and into a suitable dome-shaped mould.
  • the process includes an additional step of, prior to the addition of the fluid substance, applying a vacuum to the thermoformed body wall to maintain the shape of the body portion at least until after the heat sealing step.
  • the invention also relates to a process for the machine washing of laundry by employing a capsule according to the invention, wherein the fluid substance contained within the capsule comprises a laundry treatment agent, the process comprising the steps of:
  • the spherical inner capsule 8 is formed from PVA (Cold water soluble film sold under trade name Hi-Rhythm form Nippon Gohsei) using rotary form fill and sill technology, with pre-wetting of film to aid elasticity as disclosed in Wo97/35537.
  • PVA Cold water soluble film sold under trade name Hi-Rhythm form Nippon Gohsei
  • the inner capsule 8 contains 3 ml of said second fluid 4 which comprises ca. 80% aqueous solution of MEA-neutralised citric acid as follows:
  • the MEA-citrate 4 is dosed into the hemispherical cavities of used to form the spherical capsule 8, water sealing is achieved by simply forcing the two capsules against each other in the rotary die. The balls are then dried in a tumble dryer and left at 20 degrees C and 50 RH for two days.
  • thermoforming process is used where a number of capsules according to the invention are produced from two sheets of water soluble material.
  • recesses are formed in the sheet using a forming die having a plurality of cavities with dimensions corresponding generally to the dimensions of the capsules to be produced.
  • a single heating plate is used for thermoforming the film for all the cavities, and in the same way a single sealing plate is described.
  • a first sheet of polyvinyl alcohol film is drawn over a forming die so that the film is placed over the plurality of forming cavities in the die.
  • Each cavity is generally dome shape having a round edge, the edges of the cavities further being radiussed to remove any sharp edges which might damage the film during the forming or sealing steps of the process.
  • Each cavity further includes a raised surrounding flange.
  • the film is delivered to the forming die in a crease free form and with minimum tension.
  • the film is heated to 100 to 120°C, preferably approximately 110°C, for up to 5 seconds, preferably approximately 700 micro seconds.
  • a heating plate is used to heat the film, which plate is positioned to superpose the forming die.
  • a vacuum of 0.5 bar is pulled through the pre-heating plate to ensure intimate contact between the film and the pre-heating plate, this intimate contact ensuring that the film is heated evenly and uniformly (the extent of the vacuum is dependant of the thermoforming conditions and the type of film used, however in the present context a vacuum of less than 0.6 bar was found to be suitable)
  • Non-uniform heating results in a formed capsule having weak spots.
  • thermoformed film is moulded into the cavities blowing the film off the heating plate and/or by sucking the film into the cavities thus forming a plurality of recesses in the film which, once formed, are retained in their thermoformed orientation by the application of a vacuum through the walls of the cavities. This vacuum is maintained at least until the capsules are sealed.
  • the composition in this case a non-aqueous liquid detergent and the inner capsule 8 is added to each of the recesses.
  • a second sheet of polyvinyl alcohol film is then superposed on the first sheet across the filled recesses and heat-sealed thereto using a sealing plate.
  • the heat sealing plate which is generally flat, operates at a temperature of about 140 to 160°C, and contacts the films for 1 to 2 seconds and with a force of 8 to 30kg/cm 2 , preferably 10 to 20kg/cm 2 .
  • the raised flanges 16 surrounding each cavity ensure that the films are sealed together along the flange to form a continuous seal.
  • the radiussed edge of each cavity is at least partly formed by a resiliently deformable material, such as for example silicone rubber. This results in reduced force being applied at the inner edge of the sealing flange to avoid heat/pressure damage to the film.
  • the capsules formed are separated from the web of sheet film using cutting means. At this stage it is possible to release the vacuum on the die, and eject the formed capsules from the forming die. In this way the capsules are formed, filled and sealed while nesting in the forming die. In addition they may be cut while in the forming die as well.
  • the relative humidity of the atmosphere is controlled to ca. 50% humidity. This is done to maintain the heat sealing characteristics of the film.
  • the outer capsule 6 contains a liquid detergent composition.
  • a liquid detergent composition it is preferred that the composition is essentially non-aqueous.
  • compositions may be used which contain substantial amounts of water, provided that this water is in a form where its chemical activity is reduced (e.g. as water of crystallisation or in combination with a solvent such that its vapour pressure is reduced) such that the soluble film does not dissolve prematurely.
  • An exemplary Laundry formulation fluid contained in the outer capsule comprises the following: Ingredient wt% Alcohol Ethoxylate Nonionic (5EO) 25 LAS (alkylbenzene sulphonic acid, as acid) 20 Coco fatty acid 17 Glycerol 10 Monoethanolamine 8 Enzymes 1 Monopropylene Glycol 15 Minors 1 Water Balance 100%
  • Laundry formulation is: liquid properties formulation See next table colour Clear, transparent, colourless viscosity 270 mPas refractive index 1,333 @ 20°C formulation ingredient Level [%] Nonionic 7EO 20.0 Monopropylene glycol 23.0 Monoethanol amine 9.6 LAS acid 20.5 Fatty acid 17 Minors 5.0 Water up to 100
  • an exemplary machine dishwashing formulation for the outer capsule is given below: Composition for Outer capsule NaOH (50%) 0.740 Potassium tripolyphosphate 40.000 Glycerol (99%) 15.000 Nonionic surfactant 4.500 Antiscalant polymer 1.500 hydrophobically modified polycarboxylate 0.500 Phosphonate sequestrant 0.900 Na bicarbonate 4.500 Na sulfite 0.100 Carbopol thickener 1.180 Perfume 0.150 Dye 0.002 Wax encapsulated bleach catalyst 2.000 Water balance to 100 Composition for Inner capsule Monoethanolamine 70 Protease 5 Amylase 4 Sodium perbonate (50 ⁇ size) 21

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Detergent Compositions (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • General Preparation And Processing Of Foods (AREA)
  • Bidet-Like Cleaning Device And Other Flush Toilet Accessories (AREA)
  • Packages (AREA)
  • Manufacturing Of Micro-Capsules (AREA)
  • Formation And Processing Of Food Products (AREA)

Claims (24)

  1. Abgabeprodukt zur Abgabe einer vorbestimmten Menge von ersten und zweiten Fluids, wobei das Produkt eine äußere, in Wasser lösliche Kapsel, die eine erste fluide Substanz zur Freisetzung nach Auflösung der äußeren Kapsel enthält, und eine innere Kapsel, die eine zweite fluide Substanz zur Freisetzung nach Auflösung der inneren Kapsel enthält, umfasst, wobei die innere Kapsel kugelförmig ist.
  2. Abgabeprodukt nach Anspruch 1, wobei die innere Kapsel mit innen angeordneten Verschlüssen aufgebaut ist.
  3. Abgabeprodukt nach Anspruch 1 oder Anspruch 2, wobei die äußere Kapsel einen domförmigen Körperteil zum Enthalten des ersten Fluids aufweist.
  4. Abgabeprodukt nach Anspruch 3, wobei der domförmige Körperteil eine erste Folie aus einem in Wasser löslichen Material, thermogeformt zur Bildung einer Körperwand des Körperteils, und eine zweite Folie von in Wasser löslichem Material über der ersten Folie angeordnet und damit verschlossen entlang eines durchgehenden Bereichs von den übereinander gelegten Folien, um eine Bodenwand des Körperteils zu bilden.
  5. Abgabeprodukt nach einem vorangehenden Anspruch, dadurch gekennzeichnet, dass die maximale Höhe der Körperwand über der Bodenwand weniger als oder gleich der maximalen Breite der Bodenwand ist.
  6. Abgabeprodukt nach einem vorangehenden Anspruch, dadurch gekennzeichnet, dass die Bodenwand im Allgemeinen kreisförmig ist.
  7. Abgabeprodukt nach einem der Ansprüche 1-5, dadurch gekennzeichnet, dass die Bodenwand im Allgemeinen oval ist.
  8. Abgabeprodukt nach einem vorangehenden Anspruch, dadurch gekennzeichnet, dass die Bodenwand im Allgemeinen eben oder konkav oder konvex ist.
  9. Abgabeprodukt nach einem vorangehenden Anspruch, dadurch gekennzeichnet, dass die erste Folie der in Wasser löslichen dünnen Folie Polyvinylalkohol oder ein Polyvinylalkoholderivat umfasst.
  10. Abgabeprodukt nach einem vorangehenden Anspruch, dadurch gekennzeichnet, dass die zweite Folie von in Wasser löslichem Material Polyvinylalkohol oder ein Polyvinylalkoholderivat umfasst.
  11. Abgabeprodukt nach einem vorangehenden Anspruch, dadurch gekennzeichnet, dass das innere Kapselmaterial Polyvinylalkohol oder ein Polyvinylalkoholderivat umfasst.
  12. Abgabeprodukt nach einem vorangehenden Anspruch, dadurch gekennzeichnet, dass die fluide Substanz eine Flüssigkeit, Paste oder ein Gel darstellt.
  13. Abgabeprodukt nach einem vorangehenden Anspruch, dadurch gekennzeichnet, dass die Fluids Verbraucherhaushaltsprodukte darstellen.
  14. Abgabeprodukt nach Anspruch 13, dadurch gekennzeichnet, dass die Fluids Wäschewaschmittelzusammensetzungen sind.
  15. Abgabeprodukt nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, dass die Fluids Maschinengeschirrspülzusammensetzungen sind.
  16. Abgabeprodukt nach einem vorangehenden Anspruch, wobei die äußere Kapsel ein darin eingeschlossenes Gas aufweist.
  17. Verfahren zur Herstellung eines Abgabeprodukts zur Abgabe einer vorbestimmten Menge von ersten und zweiten Fluids, wobei das Produkt eine äußere, in Wasser lösliche Kapsel umfasst, die eine erste fluide Substanz zur Freisetzung nach Auflösung der äußeren Kapsel enthält, und eine innere Kapsel, die eine zweite fluide Substanz zur Freisetzung nach Auflösung der inneren Kapsel enthält, umfasst, wobei die innere Kapsel kugelförmig ist, wobei die äußere Kapsel einen Körperteil aufweist, der die erste fluide Substanz enthält, dadurch gekennzeichnet, dass das Verfahren die Schritte umfasst von:
    • Thermoformen einer ersten Folie von in Wasser löslichem Material, um eine domförmige Körperwand des Körperteils zu bilden;
    • Anordnen der fluiden Substanz und der inneren Kapsel in dem Körperteil;
    • Übereinander Anordnen der zweiten Folie aus einem in Wasser löslichen Material über die erste Folie; und
    • Verschließen der ersten und zweiten Folien entlang eines durchgehenden Bereichs der übereinander angeordneten Folien, die die Substanz umgeben, um eine Bodenwand des Körperteils zu bilden.
  18. Verfahren nach Anspruch 17, wobei die zweite Folie derart über der ersten Folie angeordnet ist, dass eine kleine Menge Luft in der äußeren Kapsel eingeschlossen wird.
  19. Verfahren nach Anspruch 17 oder 18 zur Herstellung eines Abgabeprodukts nach einem der Ansprüche 1 bis 15.
  20. Verfahren nach Ansprüchen 18 oder 19, dadurch gekennzeichnet, dass die ersten und zweiten Folien Wärmeverschlossen bzw. heiß versiegelt werden.
  21. Verfahren nach Ansprüchen 18-20, dadurch gekennzeichnet, dass die erste Folie von in Wasser löslichem Material mit Hilfe einer Heizplatte thermogeformt wird.
  22. Verfahren nach einem der Ansprüche 18-21, dadurch gekennzeichnet, dass vor der Zugabe des Fluids ein Vakuum an die thermogeformte Körperwand angelegt wird, um die Form des Körperteils mindestens bis nach dem Verschlussschritt zu halten.
  23. Verfahren für das Maschinenwaschen von Wäsche durch Anwenden einer Kapsel nach einem der Ansprüche 1 bis 16, dadurch gekennzeichnet, dass die innerhalb des Produkts enthaltenen Fluide ein Wäschebehandlungsmittel umfassen, wobei das Verfahren die Schritte des Anordnens von mindestens einer Kapsel in der Maschine, zusammen mit der zu waschenden Wäsche, und Ausführen eines Waschvorgangs umfasst.
  24. Verfahren zum Maschinenwaschen von Geschirr und dergleichen durch Anwenden eines Abgabeprodukts nach einem der Ansprüche 1 bis 16, dadurch gekennzeichnet, dass die in dem Produkt enthaltenen Fluids ein Maschinengeschirrspülmittel umfassen, wobei das Verfahren die Schritte des Anordnens von mindestens einer Kapsel in der Maschine, zusammen mit dem zu waschenden Geschirr, usw. und Ausführen eines Waschvorgangs umfasst.
EP04709220A 2003-03-12 2004-02-09 Wasserlösliches abgabeprodukt Expired - Lifetime EP1601754B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB0305666 2003-03-12
GBGB0305666.0A GB0305666D0 (en) 2003-03-12 2003-03-12 A water soluble delivery product
PCT/EP2004/001186 WO2004081162A1 (en) 2003-03-12 2004-02-09 A water soluble delivery product

Publications (2)

Publication Number Publication Date
EP1601754A1 EP1601754A1 (de) 2005-12-07
EP1601754B1 true EP1601754B1 (de) 2007-05-16

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EP04709220A Expired - Lifetime EP1601754B1 (de) 2003-03-12 2004-02-09 Wasserlösliches abgabeprodukt

Country Status (6)

Country Link
EP (1) EP1601754B1 (de)
AT (1) ATE362522T1 (de)
DE (1) DE602004006497T2 (de)
ES (1) ES2286606T3 (de)
GB (1) GB0305666D0 (de)
WO (1) WO2004081162A1 (de)

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EP3942010A1 (de) 2019-03-19 2022-01-26 The Procter & Gamble Company Verfahren zum waschen von stoffen
JP7381613B2 (ja) 2019-06-28 2023-11-15 ザ プロクター アンド ギャンブル カンパニー アニオン性界面活性剤を含有する溶解性固体繊維性物品
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EP1601754A1 (de) 2005-12-07
ES2286606T3 (es) 2007-12-01
GB0305666D0 (en) 2003-04-16
DE602004006497T2 (de) 2007-10-31
DE602004006497D1 (de) 2007-06-28
ATE362522T1 (de) 2007-06-15
WO2004081162A1 (en) 2004-09-23

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