US4855129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Skin-protecting or skin-care composition
Assignee: Bayer AG
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Filing: 1987-11-05
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Granted: 1989-08-08
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Expires: 2007-11-05
Abstract
Abstract A skin care or skin-protecting composition comprising a highly viscous polydimethylsiloxane which optionally contains OH, vinyl, phenyl or alkyl groups with 2 to 6 C atoms in the terminal and/or middle positions, the polydimethylsiloxane having a viscosity of 10 6 to 5×10 7 mPa.s, and a highly volatile, linear or cyclic siloxane.
Inventors
- 👤 Hans-Horst Steinbach
- 👤 Bernd Wittmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:13
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/58; A61K8/585; A61K8/72; A61K8/84; A61K8/89; A61K8/891; A61Q; A61Q17/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
69 words
A skin care or skin-protecting composition comprising as an active ingredient a highly viscous polydimethysiloxane having a viscosity of 10 6 to 5×10 7 mPa.s, and a highly volatile, linear or cyclic siloxane, wherein the content of the highly viscous polydimethylsiloxane is 5 to 20% by weight and the content of the highly volatile siloxane is 10 to 50% by weight, based on the weight of the total composition.
Claim 2
Dependent Claim
69 words
A skin care or skin-protecting composition comprising as an active ingredient a highly viscous polydimethysiloxane having a viscosity of 10 6 to 5×10 7 mPa.s, and a highly volatile, linear or cyclic siloxane, wherein the content of the highly viscous polydimethylsiloxane is 5 to 20% by weight and the content of the highly volatile siloxane is 10 to 50% by weight, based on the weight of the total composition.
Claim 3
Dependent Claim
27 words
A composition according to claim 1, wherein the polydimethylsiloxane contains OH, vinyl, phenyl and/or C 2 to C 6 alkyl groups in the terminal and/or middle positions.
Claim 4
Dependent Claim
38 words
A composition according to claim 1, wherein content of the highly viscous polydimethylsiloxane is 8 to 15% by weight and the content of the highly volatile siloxane is 20 to 40% by weight, based on the total composition.
Claim 5
Dependent Claim
49 words
A composition according to claim 1, wherein the polydimethylsiloxane contains terminal OH groups, the content of the polydimethylsiloxane of the active ingredient is 25% by weight and the content of the volatile siloxane of the active ingredient is 75% by weight, based on the weight of the total composition.
Claim 6
Dependent Claim
48 words
A composition according to claim 1, wherein the polydimethylsiloxane contains vinyl groups, the content of the polydimethylsiloxane of the active ingredient is 40% by weight and the content of the volatile siloxane of the active ingredient is 60% by weight, based on the weight of the total composition.
Claim 7
Dependent Claim
14 words
A composition according to claim 2, wherein said alkyl group is a methyl group.
Claim 8
Dependent Claim
20 words
A composition according to claim 6, wherein the content of the methyl-vinyl-siloxy group is 200 ppm to 20% by weight.
Claim 9
Dependent Claim
19 words
A composition according to claim 6, wherein the content of OH--Me 2 --SiO 1/2 is 100 to 1,000 ppm.
Claim 10
Dependent Claim
19 words
A composition according to claim 6, wherein the ratio of phenyl groups to methyl groups is 1:2.2 to 1:5.1.
Claim 11
Dependent Claim
21 words
A composition according to claim 6, wherein the content of methyl-vinyl groups in the highly viscous polydimethylsiloxane is 0.1% by weight.
Claim 12
Dependent Claim
22 words
A composition according to claim 1, wherein the highly volatile siloxane is selected from the group consisting of octamethylcyclotrasiloxane, decamethylcyclopentasiloxane and hexamethyldisiloxane.
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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) | 1992-08-07 | 1993-02-06 | 1993-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-07 | 1997-02-06 | 1997-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-07 | 2001-02-06 | 2001-08-08 | $7700.00 | Window Closed / Lapsed |