US4515784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reducing sebum spreading
Assignee: Richardson Vicks Inc
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Filing: 1983-11-16
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Granted: 1985-05-07
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Expires: 2003-11-16
Abstract
Abstract A method and composition for treating human skin, having applicabiity to oily skin and acne in order to improve the condition thereof by reducing the spreadability of sebum on the skin surface, the invention involving the application to human skin so characterized of a composition comprising, as an active component to reduce the spreadability of sebum, an effective amount of a straight chain dimethyl silicone polymer having a molecular weight of about 50,000 or more and a viscosity of about 10,000 centistokes or more.
Inventors
- 👤 Rodger E. Bogardus
- 👤 Jon D. Packer
- 👤 James P. SaNogueira
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:54
CPC Classifications
A; A61; A61Q; A61Q19/00; A61Q19/10; A61K; A61K8/00; A61K8/18; A61K8/72; A61K8/84; A61K8/89; A61K8/891; A61P; A61P17/00; A61Q19/008
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
95 words
A method of treating human skin, characterized by an exessive secretion of sebum or by acne, to improve the condition thereof by reducing the spreadability of sebum on the skin surface which comprises topically applying to human skin so characterized a composition for topical skin application comprising, as an active component to reduce sebum spreading, an effective amount of a dimethyl silicone polymer having the formula: ##STR2## wherein n is a positive integer sufficient to provide a silicone polymer having a molecular weight of 50,000 or more and a viscosity of 10,000 centistokes or more.
Claim 2
Independent Claim
95 words
A method of treating human skin, characterized by an exessive secretion of sebum or by acne, to improve the condition thereof by reducing the spreadability of sebum on the skin surface which comprises topically applying to human skin so characterized a composition for topical skin application comprising, as an active component to reduce sebum spreading, an effective amount of a dimethyl silicone polymer having the formula: ##STR2## wherein n is a positive integer sufficient to provide a silicone polymer having a molecular weight of 50,000 or more and a viscosity of 10,000 centistokes or more.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein the polymer has a viscosity of more than 100,000 centistokes.
Claim 4
Dependent Claim
31 words
The method of claim 1 wherein the skin is characterized by an excessive secretion of sebum and the active component is in a non-toxic cosmetic carrier suitable for topical skin application.
Claim 5
Dependent Claim
22 words
The method of claim 1 wherein the skin is characterized by acne and the active component is in a topical anti-acne composition.
Claim 6
Dependent Claim
31 words
The method of claim 2 wherein the skin is characterized by an excessive secretion of sebum and the active component is in a non-toxic cosmetic carrier suitable for topical skin application.
Claim 7
Dependent Claim
22 words
The method of claim 2 wherein the skin is characterized by acne and the active component is in a topical anti-acne composition.
Claim 8
Dependent Claim
31 words
The method of claim 3 wherein the amount of dimethyl silicone polymer in said composition is in the range of from about 1 to about 90% by weight of the composition.
Claim 9
Dependent Claim
31 words
The method of claim 4 wherein the amount of dimethyl silicone polymer in said composition is in the range of from about 1 to about 90% by weight of the composition.
Claim 10
Dependent Claim
31 words
The method of claim 5 wherein the amount of dimethyl silicone polymer in said composition is in the range of from about 1 to about 90% by weight of the composition.
Claim 11
Dependent Claim
31 words
The method of claim 6 wherein the amount of dimethyl silicone polymer in said composition is in the range of from about 1 to about 90% by weight of the composition.
Claim 12
Dependent Claim
31 words
The method of claim 3 wherein the amount of dimethyl silicone polymer in said composition is in the range of from about 3 to about 15% by weight of the composition.
Claim 13
Dependent Claim
31 words
The method of claim 4 wherein the amount of dimethyl silicone polymer in said composition is in the range of from about 3 to about 15% by weight of the composition.
Claim 14
Dependent Claim
31 words
The method of claim 5 wherein the amount of dimethyl silicone polymer in said composition is in the range of from about 3 to about 15% by weight of the composition.
Claim 15
Dependent Claim
31 words
The method of claim 6 wherein the amount of dimethyl silicone polymer in said composition is in the range of from about 3 to about 15% by weight of the composition.
Claim 16
Dependent Claim
16 words
The method of claim 1 wherein the dimethyl silicone polymer is solubilized in a cyclodimethicone oligmer.
Claim 17
Dependent Claim
25 words
The method of claim 15 wherein the dimethyl silicone polymer is solubilized in a solubilizing agent which is a mixture of cyclodimethicone tetramer and pentamer.
Claim 18
Dependent Claim
18 words
The method of claim 16 wherein the solubilizing agent is a 90:10 w/w mixture of tetramer and pentamer.
Claim 19
Dependent Claim
27 words
The method of claim 17 wherein the dimethyl silicone polymer has a molecular weight of about 330,000 in a 12.5% by weight solution of the solubilizing agent.
Claim 20
Dependent Claim
16 words
The method of claim 2 wherein the dimethyl silicone polymer is solubilized in a cyclodimethicone oligmer.
Claim 21
Dependent Claim
25 words
The method of claim 19 wherein the dimethyl silicone polymer is solubilized in a solubilizing agent which is a mixture of cyclodimethicone tetramer and pentamer.
Claim 22
Dependent Claim
18 words
The method of claim 20 wherein the solubilizing agent is a 90:10 w/w mixture of tetramer and pentamer.
Claim 23
Dependent Claim
64 words
A topical anti-acne composition, containing a therapeutic anti-acne active ingredient the improvement characterized by the presence in said anti-acne composition of a sebum spreading reducing effective amount of a dimethyl silicone polymer of the formula: ##STR3## wherein n is a positive integer sufficient to provide a silicone polymer having a molecular weight of 50,000 or more and a viscosity of 10,000 centistokes or more.
Claim 24
Dependent Claim
64 words
A topical anti-acne composition, containing a therapeutic anti-acne active ingredient the improvement characterized by the presence in said anti-acne composition of a sebum spreading reducing effective amount of a dimethyl silicone polymer of the formula: ##STR3## wherein n is a positive integer sufficient to provide a silicone polymer having a molecular weight of 50,000 or more and a viscosity of 10,000 centistokes or more.
Claim 25
Dependent Claim
20 words
The anti-acne composition of claim 22 wherein in the viscosity of the dimethyl silicone polymer is more than 100,000 centistokes.
Claim 26
Dependent Claim
31 words
The anti-acne composition of claim 23 wherein the dimethyl silicone polymer is present in the composition in an amount of from about 3% to about 15% by weight of the composition.
Claim 27
Dependent Claim
50 words
The anti-acne composition of claim 23 wherein the dimethyl silicone polymer is solubilized in a solubilizing agent which is a 90:10 w/w mixture of cyclodimethicone tetramer and pentamer and the dimethyl silicone polymer has a molecular weight of about 330,000 in a 12.5% by weight solution of the solubilizing agent.
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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) | 1988-05-06 | 1988-11-05 | 1989-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-06 | 1992-11-05 | 1993-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-06 | 1996-11-05 | 1997-05-07 | $7700.00 | Window Closed / Lapsed |