US5246780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated particle for use in cosmetic preparations and method
Assignee: L'Oréal SA
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Filing: 1991-08-29
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Granted: 1993-09-21
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Expires: 2011-08-29
Abstract
Abstract A coated particle useful in cosmetic compositions including a base particle, a coupling agent and an outer coating, and a method of making same. A preferred embodiment comprises hollow spherical polyvinylidene copolymer base particles, isopropyl tri-isostearyl titanate as the coupling agent and boron nitrate powder as the outer coating.
Inventors
- 👤 Alan M. Farer
- 👤 Elisa L. Burdzy
- 👤 Fifi Hanna
- 👤 A. John Penicnak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:10
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/02; A61K8/11; A61K8/0241; A61K8/025; A61K8/18; A61K8/19; A61K8/25; A61K8/72; A61K8/81; A61K8/8123; A61K8/8141; A61K8/8152; A61Q; A61Q1/00; A61Q1/02; A61Q1/08; A61Q1/12; C; C09; C09B; C09B67/00; C09B67/0097; A61K2800/00; A61K2800/40; A61K2800/41; A61K2800/412; A61K2800/42; A61K2800/43; A61K2800/57; A61K2800/60; A61K2800/61; A61K2800/62; A61K2800/623; A61K2800/65; A61K2800/654; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2995; Y10T428/2998
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
62 words
A coated particle for use in cosmetic preparations comprising a base particle having an outer surface, a first coating of coupling agent selected from the group consisting of silanes and titanates overlying said outer surface, and second coating of boron nitride overlying said first coating, wherein said boron nitride is present in the amount of 50-99% by weight of said coated particle.
Claim 2
Dependent Claim
62 words
A coated particle for use in cosmetic preparations comprising a base particle having an outer surface, a first coating of coupling agent selected from the group consisting of silanes and titanates overlying said outer surface, and second coating of boron nitride overlying said first coating, wherein said boron nitride is present in the amount of 50-99% by weight of said coated particle.
Claim 3
Dependent Claim
15 words
A coated particle according to claim 1 wherein said coupling agent is isopropyl triisostearyl titanate.
Claim 4
Dependent Claim
30 words
A coated particle according to claim 2 wherein said base particle is selected from the group consisting of polyamide, starch, polymethylmethacrylate, low density polyethylene, silica, polyvinylidene chloride copolymer and polystyrene.
Claim 5
Dependent Claim
13 words
A coated particle according to claim 3 wherein said base particle is polyamide.
Claim 6
Dependent Claim
13 words
A coated particle according to claim 3 wherein said base particle is starch.
Claim 7
Dependent Claim
13 words
A coated particle according to claim 3 wherein said base particle is silica.
Claim 8
Dependent Claim
16 words
A coated particle according to claim 3 wherein said base particle is a polyvinylidene chloride copolymer.
Claim 9
Dependent Claim
27 words
A coated particle according to claim 7 where said base particle has a particle size of 20-40μ and a density of 0.01 to 0.065 gm/cm 3 .
Claim 10
Dependent Claim
17 words
A coated particle according to claim 2 wherein said coated particle has a particle size of 5-80μ.
Claim 11
Independent Claim
84 words
A method of forming coated particles for use in cosmetic preparations comprising applying a first coating of coupling agent to a base particle wherein said coupling agent is present in the amount of 0.01 to 5.0 weight % based upon base particle weight and is selected from the group consisting of silanes and titanates, and applying a second coating of boron nitride to overlie said first coating wherein said boron nitride is present in the amount of 50-99% by weight of said coated particle.
Claim 12
Independent Claim
84 words
A method of forming coated particles for use in cosmetic preparations comprising applying a first coating of coupling agent to a base particle wherein said coupling agent is present in the amount of 0.01 to 5.0 weight % based upon base particle weight and is selected from the group consisting of silanes and titanates, and applying a second coating of boron nitride to overlie said first coating wherein said boron nitride is present in the amount of 50-99% by weight of said coated particle.
Claim 13
Dependent Claim
14 words
A method according to claim 10 wherein said coupling agent is isopropyl triisostearoyl titanate.
Claim 14
Dependent Claim
27 words
A method according to claim 11 wherein said base particle is selected from the group consisting of polyamide, starch, polymethylmethacrylate, polyethylene, silica, polyvinylidene chloride copolymer and polystyrene.
Claim 15
Dependent Claim
12 words
A method according to claim 12 wherein said base particle is polyamide.
Claim 16
Dependent Claim
12 words
A method according to claim 12 wherein said base particle is starch.
Claim 17
Dependent Claim
12 words
A method according to claim 12 wherein said base particle is silica.
Claim 18
Dependent Claim
15 words
A method according to claim 12 wherein said base particle is a polyvinylidene chloride copolymer.
Claim 19
Dependent Claim
27 words
A method according to claim 16 wherein said base particle has a particle size of about 20-40μ and a density of 0.01 to 0.065 gm/cm 3 .
Claim 20
Dependent Claim
10 words
A cosmetic preparation comprising the coated particle of claim 1.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-09-20 | 1997-03-22 | 1997-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-20 | 2001-03-22 | 2001-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-20 | 2005-03-22 | 2005-09-21 | $7700.00 | Window Closed / Lapsed |