US4536399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of fumed silica for treating oily skin and acne
Assignee: NORCLIFF THAYER Inc A CORP OF
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Filing: 1984-02-09
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Granted: 1985-08-20
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Expires: 2004-02-09
Abstract
Abstract Therapeutic compositions containing fumed silica for the treatment of oily skin, and, optionally, containing benzoyl peroxide or salicylic acid for treatment of acne are disclosed.
Inventors
- 👤 Robert G. Flynn
- 👤 Courtney G. Pitkin
- 👤 Gregory A. Hileman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:01
CPC Classifications
A; A61; A61Q; A61Q19/00; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/26; A61K8/30; A61K8/33; A61K8/36; A61K8/368; A61K8/38; A61Q19/008; Y; Y10; Y10S; Y10S424/00; Y10S424/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
73 words
A composition for application to oily skin consisting essentially of by weight: 1-10% fumed silica consisting of 99.8% silicone dioxide on an ignited weight basis and capable of absorbing about 4 gm of squalene oil per gm, in an oil-in-water emulsion carrier, said carrier consisting of 1-4% of a thickening agent/emollient selected from the group consisting of cetyl alcohol, stearic acid and glycerol monostearate, 0.25-1.5% sodium lauryl sulfate emulsifier and water q.s. 100%.
Claim 2
Dependent Claim
73 words
A composition for application to oily skin consisting essentially of by weight: 1-10% fumed silica consisting of 99.8% silicone dioxide on an ignited weight basis and capable of absorbing about 4 gm of squalene oil per gm, in an oil-in-water emulsion carrier, said carrier consisting of 1-4% of a thickening agent/emollient selected from the group consisting of cetyl alcohol, stearic acid and glycerol monostearate, 0.25-1.5% sodium lauryl sulfate emulsifier and water q.s. 100%.
Claim 3
Dependent Claim
24 words
A method of treating oily skin in humans comprising topically applying an amount effective to treat oily skin of the composition of claim 1.
Claim 4
Dependent Claim
76 words
A composition for application to oily skin consisting essentially of by weight: 1-10% benzoyl peroxide; 1-10% fumed silica consisting of 99.8% silicone dioxide on an ignited weight basis and capable of absorbing about 4 gm of squalene oil per gm, in an oil-in-water emulsion carrier, said carrier consisting of 1-4% of a thickening agent/emollient selected from the group consisting of cetyl alcohol, stearic acid and glycerol monostearate, 0.25-1.5% sodium lauryl sulfate emulsifier, and water q.s. 100%.
Claim 5
Dependent Claim
76 words
A composition for application to oily skin consisting essentially of by weight: 1-10% benzoyl peroxide; 1-10% fumed silica consisting of 99.8% silicone dioxide on an ignited weight basis and capable of absorbing about 4 gm of squalene oil per gm, in an oil-in-water emulsion carrier, said carrier consisting of 1-4% of a thickening agent/emollient selected from the group consisting of cetyl alcohol, stearic acid and glycerol monostearate, 0.25-1.5% sodium lauryl sulfate emulsifier, and water q.s. 100%.
Claim 6
Dependent Claim
22 words
A method of treating acne in humans comprising topically applying an amount effective to treat acne of the composition of claim 3.
Claim 7
Dependent Claim
76 words
A composition for application to oily skin consisting essentially of by weight: 1-10% salicylic acid; 1-10% fumed silica consisting of 99.8% silicone dioxide on an ignited weight basis and capable of absorbing about 4 gm of squalene oil per gm, in an oil-in-water emulsion carrier, said carrier consisting of 1-4% of a thickening agent/emollient selected from the group consisting of cetyl alcohol, stearic acid and glycerol monostearate, 0.25-1.5% sodium lauryl sulfate emulsifier, and water q.s. 100%.
Claim 8
Dependent Claim
76 words
A composition for application to oily skin consisting essentially of by weight: 1-10% salicylic acid; 1-10% fumed silica consisting of 99.8% silicone dioxide on an ignited weight basis and capable of absorbing about 4 gm of squalene oil per gm, in an oil-in-water emulsion carrier, said carrier consisting of 1-4% of a thickening agent/emollient selected from the group consisting of cetyl alcohol, stearic acid and glycerol monostearate, 0.25-1.5% sodium lauryl sulfate emulsifier, and water q.s. 100%.
Claim 9
Dependent Claim
22 words
A method of treating acne in humans comprising topically applying an amount effective to treat acne of the composition of claim 5.
References Cited (Backward Citations)
US2435005A
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GB825452A
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US4000317A
Cited
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Cited
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Cited
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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) | 1988-08-19 | 1989-02-18 | 1989-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-19 | 1993-02-18 | 1993-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-19 | 1997-02-18 | 1997-08-20 | $7700.00 | Window Closed / Lapsed |