EP0785763A1 - Compositions cosmetiques en poudre - Google Patents

Compositions cosmetiques en poudre

Info

Publication number
EP0785763A1
EP0785763A1 EP95911973A EP95911973A EP0785763A1 EP 0785763 A1 EP0785763 A1 EP 0785763A1 EP 95911973 A EP95911973 A EP 95911973A EP 95911973 A EP95911973 A EP 95911973A EP 0785763 A1 EP0785763 A1 EP 0785763A1
Authority
EP
European Patent Office
Prior art keywords
composition according
cosmetic composition
weight
powder
cosmetic
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.)
Ceased
Application number
EP95911973A
Other languages
German (de)
English (en)
Other versions
EP0785763A4 (fr
Inventor
Delyth Myfanwy Jenkins
Gillian Scott Briggs
Karen Fish
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.)
Procter and Gamble Co
Original Assignee
Procter and Gamble Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Procter and Gamble Co filed Critical Procter and Gamble Co
Publication of EP0785763A4 publication Critical patent/EP0785763A4/en
Publication of EP0785763A1 publication Critical patent/EP0785763A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q1/00—Make-up preparations; Body powders; Preparations for removing make-up
    • A61Q1/12—Face or body powders for grooming, adorning or absorbing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/31—Hydrocarbons
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
    • A61K8/36—Carboxylic acids; Salts or anhydrides thereof
    • A61K8/368—Carboxylic acids; Salts or anhydrides thereof with carboxyl groups directly bound to carbon atoms of aromatic rings
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
    • A61K8/81—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • A61K8/8105—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • A61K8/8111—Homopolymers or copolymers of aliphatic olefines, e.g. polyethylene, polyisobutene; Compositions of derivatives of such polymers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
    • A61K8/81—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • A61K8/8141—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • A61K8/8152—Homopolymers or copolymers of esters, e.g. (meth)acrylic acid esters; Compositions of derivatives of such polymers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
    • A61K8/84—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
    • A61K8/89—Polysiloxanes
    • A61K8/891—Polysiloxanes saturated, e.g. dimethicone, phenyl trimethicone, C24-C28 methicone or stearyl dimethicone
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
    • A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
    • A61K2800/56—Compounds, absorbed onto or entrapped into a solid carrier, e.g. encapsulated perfumes, inclusion compounds, sustained release forms

Definitions

  • the present invention relates to powder cosmetic compositions.
  • it relates to powder cosmetic compositions for purposes of make-up and the like which provide improved adhesion to the skin, increased wear, coverage and reduced rub-off.
  • Make-up compositions are generally available in the form of liquid or cream suspensions, emulsions, gels, anhydrous oil and wax compositions or pressed and loose powders.
  • Make-up is normally applied to the face in two stages. In a first stage, a liquid or cream foundation is applied. This is followed by application of a powder composition, the function of which is to impart a smooth finish to facial skin, masking minor visible imperfections and shine.
  • W088/00039 discloses a pressed facial cosmetic powder comprising a blend of moisturising and oil absorbing clays, filler, dry binder and liquid binder.
  • US Patent No. 4,804,532 recites a facial cosmetic powder which utilises crystalline silica in much lower concentration than that employed in the then prior art compositions.
  • This powder used as a blush or a facial coating, is said to be effective in hiding skin wrinkles, lines and pores.
  • the composition is a mixture of a colour phase and a diluent phase.
  • the colour phase is formed by blending crystalline silica with colourants.
  • the resultant colour phase is mixed with the diluent phase, essentially formed from nacreous materials such as talc and mica, to form the composition.
  • Pressed and loose cosmetic powder compositions for application to the face are well-known and help to provide good skin coverage and appearance with reduced shine, especially when used with foundations. It would however be desirable to improve the substantivity characteristics such as improved skin adhesion, wear and coverage of cosmetic powder compositions. It would also be desirable to provide a powder composition having prolonged topical anti-acne and/or anti-bacterial activity.
  • a powder composition having prolonged topical anti-acne and/or anti-bacterial activity There are many compounds which are known to exhibit anti-acne and/or anti ⁇ bacterial properties when applied topically to the skin.
  • a commonly used keratolytic agent having anti-acne activity is salicylic acid. Zinc oxide is also known for use in anti-acne compositions.
  • CN-A-1032902 discloses a skin disease treatment and protection powder containing borax, zinc oxide, benzoic acid, talcum powder and salicylic acid.
  • a cosmetic composition in the form of a powder comprising:
  • x has a value of from 1 to about 1 ,000, y has a value of from 0 to 1,000 and R is selected from H and C1-C50 alkyl;
  • the powder cosmetic compositions of the present invention provide improved adhesion to the skin, coverage and wear characteristics. Highly preferred embodiments also provide excellent anti-acne activity. According to another aspect of the present invention there is provided a cosmetic composition in the form of a powder comprising;
  • composition comprising one or more cosmetic powder base components selected from pigments, matte finishing agents, fillers and binders and mixtures thereof.
  • the powder cosmetic composition according to one aspect of the present invention comprises a silicone or mixture of silicones together with one or more cosmetic base powder components inclusive of pigments, fillers and binders.
  • a first essential component is a silicone or mixture of silicones.
  • the silicone or mixture of silicones used herein comprises an alkylmethylsiloxane polymer having the formula:
  • x has a value of from about 1 to about 1000
  • y has a value of from 0 to about 1000
  • R is selected from H and C1-C50 alkyl.
  • R is more preferably a C4-C24 alkyl group.
  • Suitable alkylmethylsiloxanes for use herein are commercially available from Dow Corning Corporation. Particularly preferred for use in the powder compositions of the present invention is Dow Corning 2502 cosmetic fluid which is known by its CTFA designation as Cetyl Dimethicone.
  • the silicone or mixture of silicones is present in the compositions of the invention at a level of from about 0.01% to about 20%, preferably from about 0.5% to about 10% by weight of composition. Also suitable for use herein are mixtures of alkylmethylsiloxanes with one or more silicone materials as set out below.
  • the powder compositions according to the invention preferably also comprise a branched chain aliphatic hydrocarbon having a molecular weight of from about 100 to about 15,000, preferably from about 200 to about 1000.
  • the branched chain aliphatic hydrocarbon is preferred herein from the viewpoint of providing improved skin adhesion and can be used either alone or in combination with the above mentioned silicone or mixture of silicones.
  • the branched chain aliphatic hydrocarbon can be selected from isododecane, isohexadecane, isoeicosane, isooctahexacontane, isohexapentacontahectane and isopentacontaoctactane, and mixtures thereof.
  • Suitable for use herein are branched chain aliphatic hydrocarbons sold under the trade name Permethyl (RTM) and commercially available from Presperse Inc., P.O. Box 735, South Plainfield, N. J. O7080, U.S.A.
  • Particularly suitable herein from the viewpoint of improved skin adhesion, coverage, wear and reduced rub-off is Permethyl 102A which is chemically known as isoeicosane.
  • compositions herein also comprise one or more cosmetic base powder components selected from pigments, fillers and binders, and mixtures thereof.
  • cosmetic base powder components selected from pigments, fillers and binders, and mixtures thereof.
  • many of the conventional components of powder cosmetic compositions have more than one functionality and they can therefore be classified under more than one functional type, e.g. TiC»2, talc and zinc oxide all act both as pigments and fillers.
  • Zinc oxide is also particularly useful herein as an anti-acne component.
  • Polyethylene can act both as matte finishing agent and binder.
  • these other cosmetic base powder components will generally comprise up to about 99% by weight, preferably from about 60% to about 98% by weight of the composition.
  • Suitable pigments for use herein can be inorganic and/or organic. Also included within the term pigment are materials having a low colour or lustre such as matte finishing agents, and also light scattering agents. Examples of suitable pigments are iron oxides, acylglutamate iron oxides, ultramarine blue, D&C dyes, carmine, and mixtures thereof.
  • the powder compositions can also include at least one matte finishing agent.
  • the function of the matte finishing agent is to hide skin defects and reduce shine.
  • Such cosmetically acceptable inorganic agents i.e., those included in the CTFA Cosmetic Ingredient Dictionary, Third Ed., as silica, hydrated silica, silicone-treated silica beads, mica, talc, polyethylene, calcium silicate, titanium dioxide, bentonite, hectorite, kaolin, chalk, diatomaceous earth, attapugite, zinc oxide and the like may be utilised.
  • a matte finishing agent is low lustre pigment such as titanated mica (mica coated with titanium dioxide) coated with barium sulphate.
  • low lustre pigment, talc, hydrated silica, kaolin, titanium dioxide and mixtures thereof are particularly preferred.
  • Materials suitable for use herein as light-scattering agents can be generally described as spherical shaped inorganic materials having a particle size of up to about 100 microns, preferably from about 5 to about 50 microns, for example spherical silica particles.
  • the total concentration of high lustre colouring agents in the powder cosmetic compositions may be from about 0.01% to about 30% by weight, preferably from about 1% to about 20%, and more preferably from about 1% to about 15% by weight of the total composition, the exact concentration being dependent to some extent upon the specific mixture of pigments selected to achieve the desired shades.
  • the preferred compositions contain from about 0.1% to about 5% by weight of iron oxides.
  • pigments are also suitable for use herein especially from the viewpoint of moisturisation, skin feel, skin appearance and emulsion compatibility.
  • Pigments can be treated with compounds such as amino acids (e.g., lysine), silicones, lauroyl, collagen, polyethylene, lecithin and ester oils.
  • amino acids e.g., lysine
  • silicones e.g., silicones, lauroyl, collagen, polyethylene, lecithin and ester oils.
  • the more preferred pigments are the silicone (polysiloxane) treated pigments.
  • the powder compositions herein can also comprise one or more filler materials.
  • suitable fillers include talc, rice starch and/or bismuth oxychloride, preferably talc.
  • a dry binder in the powder compositions of the invention.
  • suitable dry binders include magnesium stearate, zinc stearate, calcium stearate, lithium stearate, and mixtures thereof.
  • an anti-acne active is preferably also included in the compositions of the present invention.
  • Suitable anti-acne actives for use herein include salicylic acid, retinoic acid, azelaic acid, lactic acid, glycolic acid, pyruvic acid, flavonoids, and derivatives and mixtures thereof.
  • the anti- acne active used herein is preferably salicylic acid.
  • the anti-acne active is present at a level of from about 0.01% to about 10% by weight of composition.
  • compositions herein Another highly preferred component in the compositions herein is an anti ⁇ bacterial agent.
  • the preferred anti-bacterial agent for use herein is zinc oxide.
  • ultrafine zinc oxide having an average particle size of from about 0.1 ⁇ m to about 5 ⁇ m, preferred from about 0.5 to about 1.5 ⁇ m.
  • the compositions herein based on a mixture of zinc oxide with silicone and/or branched chain hydrocarbon are found to be especially effective against bacteria of the P. acnes variety and therefore have excellent anti-acne activity.
  • the powder compositions of the present invention can also comprise a particulate cross-linked hydrophobic acrylate or methacrylate copolymer.
  • This copolymer is particularly valuable for reducing shine and controlling oil.
  • the cross-linked hydrophobic polymer is preferably in the form of a copolymer lattice and can contain at least one active ingredient dispersed uniformly throughout and entrapped within the copolymer lattice.
  • the hydrophobic polymer can take the form of a porous particle having a surface area (N2-BET) in the range from about 50 to 500, preferably 100 to 300m2/g and having the active ingredient absorbed therein.
  • the cross-linked hydrophobic polymer when used herein is in an amount of from about 0.1% to about 10% by weight.
  • the active ingredient can be one or more or a mixture of skin compatible oils, skin compatible humectants, emollients, moisturising agents, anti-acne actives and sunscreens.
  • the polymer material is in the form of a powder, the powder being a combined system of particles.
  • the system of powder particles forms a lattice which includes unit particles of less than about one micron in average diameter, agglomerates of fused unit particles of sized in the range of about 20 to 100 microns in average diameter and aggregates of clusters of fused agglomerates of sizes in the range of about 200 to 1,200 microns in average diameter.
  • the powder material of the present invention which can be employed as the carrier for the active ingredient can be broadly described as a cross- linked "post absorbed" hydrophobic polymer lattice.
  • the powder preferably has entrapped and dispersed therein, an active which may be in the form of a solid, liquid or gas.
  • the lattice is in particulate form and constitutes free flowing discrete solid particles when loaded with the active material.
  • the lattice may contain a predetermined quantity of the active material.
  • the polymer has the structural formula:
  • the hydrophobic polymer is a highly cross-linked polymer, more particularly a highly cross-linked polymethacrylate copolymer.
  • the material is manufactured by the Dow Corning Corporation, Midland, Michigan, USA, and sold under the trademark POLYTRAP (RTM). It is an ultralight free-flowing white powder and the particles are capable of absorbing high levels of lipophilic liquids and some hydrophilic liquids while at the same time maintaining a free-flowing powder character.
  • the powder structure consists of a lattice of unit particles less than one micron that are fused into agglomerates of 20 to 100 microns and the agglomerates are loosely clustered into macro-particles or aggregates of about 200 to about 1200 micron size.
  • the polymer powder is capable of containing as much as four times its weight of fluids, emulsions, dispersions or melted solids.
  • Adsorption of actives onto the polymer powder can be accomplished using a stainless steel mixing bowl and a spoon, wherein the active is added to the powder and the spoon is used to gently fold the active into the polymer powder.
  • Low viscosity fluids may be adsorbed by addition of the fluids to a sealable vessel containing the polymer and then tumbling the materials until a consistency is achieved. More elaborate blending equipment such as ribbon or twin cone blenders can also be employed.
  • Microsponges 5647 is also suitable as a highly cross-linked polymethacrylate copolymer. This takes the form of generally spherical particles of cross-linked hydrophobic polymer having a pore size of from about 0.0 l ⁇ m to about 0.05 ⁇ m and a surface area of 200-300m2/g. Again, it can be loaded with an active ingredient such as those described herein above. Also suitable for use herein is Microsponges 5640.
  • compositions of the invention include preservatives in amounts generally less than about 1% by weight. Suitable preservatives include methylparaben, propylparaben, imidazolidimyl urea, phenoxyethanol, and mixtures thereof.
  • the compositions may also contain fragrances, sunscreens and chelating agents.
  • compositions herein are sunscreens, vitamins and moisturising agents.
  • cetrimonium bromide can be used as an anti-bacterial agent.
  • the powder make-up compositions of the present invention can be in the form of loose or pressed powder.
  • the compositions can also be in the form of eyeshadow and blushers. Examples I-V
  • powder cosmetic compositions of the above examples provide improved skin adhesion, wear, coverage and reduced rub-off characteristics.
  • compositions can be prepared as follows. The dry ingredients are weighed into a ribbon blender and mixed for about 15 minutes until homogeneous. Next the dry mixture is pulverised through an 020 herringbone screen. The liquid ingredients are then sprayed into the dry mixture with stirring. The batch is pulverised and sieved before being ready for packaging.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Birds (AREA)
  • Epidemiology (AREA)
  • Emergency Medicine (AREA)
  • Cosmetics (AREA)

Abstract

L'invention concerne des compositions cosmétiques sous la forme d'une poudre contenant une silicone ou un mélange de silicones. La silicone ou le mélange de silicones contient un polymère d'alkylméthylsiloxane, le restant de la composition étant constitué d'un ou de plusieurs composants de base pour poudres cosmétiques choisis parmi des pigments, des agents matifiants, des charges et des liants. Les compositions assurent une meilleure adhésion à la peau, une meilleure couverture de la peau et les pertes par frottement sont diminuées.
EP95911973A 1994-03-18 1995-02-27 Compositions cosmetiques en poudre Ceased EP0785763A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9405322A GB9405322D0 (en) 1994-03-18 1994-03-18 Powder cosmetic compositions
GB9405322 1994-03-18
PCT/US1995/002444 WO1995025499A1 (fr) 1994-03-18 1995-02-27 Compositions cosmetiques en poudre

Publications (2)

Publication Number Publication Date
EP0785763A4 EP0785763A4 (fr) 1997-07-30
EP0785763A1 true EP0785763A1 (fr) 1997-07-30

Family

ID=10752072

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95911973A Ceased EP0785763A1 (fr) 1994-03-18 1995-02-27 Compositions cosmetiques en poudre

Country Status (7)

Country Link
EP (1) EP0785763A1 (fr)
JP (1) JPH09510474A (fr)
CN (1) CN1143905A (fr)
AU (1) AU1934195A (fr)
CA (1) CA2184907A1 (fr)
GB (1) GB9405322D0 (fr)
WO (1) WO1995025499A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6074672A (en) * 1996-06-28 2000-06-13 Chesebrough-Pond's Usa Co., Division Of Conopco, Inc. Powdered cosmetic compositions containing silicone elastomers
US8394394B2 (en) 2004-05-26 2013-03-12 L'oréal Mousse formulations
US20080213322A1 (en) * 2006-10-05 2008-09-04 Michael Birman Method for the hydrophobic treatment of pigment particles and the personal care compositions comprising said pigment particles
KR100960629B1 (ko) 2006-11-13 2010-06-07 로레알 콤팩트 파우더 조성물
DE102010021671A1 (de) * 2010-05-27 2011-12-01 Intendis Gmbh Azelainsäurehaltige Formulierung mit Pigmentzusatz
DE102023203795A1 (de) 2022-05-04 2023-11-09 Beiersdorf Aktiengesellschaft Kosmetische oder dermatologische Zubereitungen zur Prophylaxe und Linderung der erythropoetischen Protoporphyrie

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985003434A1 (fr) * 1984-02-06 1985-08-15 Neutrogena Corporation Vehicule ameliore d'administration d'ingredients pharmaceutiques actifs sur la peau humaine
US5082661A (en) * 1990-09-26 1992-01-21 Elizabeth Arden Co., Division Of Conopco, Inc. Odorless cosmetic compositions in gelatin capsules
JPH05186328A (ja) * 1992-01-13 1993-07-27 Kao Corp 皮膚清浄・清拭剤組成物
WO1993017660A1 (fr) * 1992-03-05 1993-09-16 L'oreal Composition cosmetique sous forme de poudre contenant un liant gras silicone

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0255843A1 (fr) * 1986-08-05 1988-02-17 Württembergische Parfümerie-Fabrik GmbH Procédé de préparation de formulations de poudre solide de couleurs différentes
US5162378A (en) * 1990-04-20 1992-11-10 Revlon Consumer Products Corporation Silicone containing water-in-oil microemulsions having increased salt content
GB9010526D0 (en) * 1990-05-10 1990-07-04 Unilever Plc Cosmetic composition

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985003434A1 (fr) * 1984-02-06 1985-08-15 Neutrogena Corporation Vehicule ameliore d'administration d'ingredients pharmaceutiques actifs sur la peau humaine
US5082661A (en) * 1990-09-26 1992-01-21 Elizabeth Arden Co., Division Of Conopco, Inc. Odorless cosmetic compositions in gelatin capsules
JPH05186328A (ja) * 1992-01-13 1993-07-27 Kao Corp 皮膚清浄・清拭剤組成物
WO1993017660A1 (fr) * 1992-03-05 1993-09-16 L'oreal Composition cosmetique sous forme de poudre contenant un liant gras silicone

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 017, no. 617 (C-1129) 15 November 1993 & JP 05 186 328 A (KAO CORP) 27 July 1993 *
See also references of WO9525499A1 *

Also Published As

Publication number Publication date
CA2184907A1 (fr) 1995-09-28
AU1934195A (en) 1995-10-09
EP0785763A4 (fr) 1997-07-30
JPH09510474A (ja) 1997-10-21
MX9604133A (es) 1997-12-31
CN1143905A (zh) 1997-02-26
GB9405322D0 (en) 1994-04-27
WO1995025499A1 (fr) 1995-09-28

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