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US 4,536,399 AGranted
Use of fumed silica for treating oily skin and acne
AssigneeNorcliff Thayer, Inc.
InventorsRobert G. Flynn, Courtney G. Pitkin, Gregory A. Hileman
Life of this patent
Estimating the term…
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.
Claims6
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%.
1 more element
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%.
1 more element
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%.
1 more element
Dependencies are inferred from the claim text.