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US4938969A
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Method for the treatment of aging or photo-damaged skin
Assignee: Bioderm Inc
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Filing: 1988-11-14
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Granted: 1990-07-03
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Expires: 2008-11-14
Abstract
Abstract A composition for reducing the depth or intensity of fine wrinkles in skin affected by intrinsic or photo-induced aging is described. The topical formulation comprises in combination ascorbic acid, tyrosine and a non-toxic zinc salt and is preferably formulated in a hydrophilic ointment or cream base.
Inventors
- 👤 Michael R. Schinitsky
- 👤 Lorraine F. Meisner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:39
CPC Classifications
A; A61; A61Q; A61Q19/00; A61Q19/08; A61K; A61K33/00; A61K33/24; A61K33/30; A61K8/00; A61K8/18; A61K8/19; A61K8/27; A61K8/30; A61K8/40; A61K8/44; A61K8/67; A61K8/676; A61P; A61P17/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
72 words
A method of treatment to reduce the depth of wrinkles in a patient's skin affected by intrinsic aging or photo-induced aging, said method comprising the step of applying a composition comprising about 2 to about 20% of ascorbic acid, about 1 to about 10% tyrosine, and about 0.5 to about 5% of a non-toxic zinc salt in a pharmaceutically acceptable carrier, said composition being applied topically to the locus of said wrinkles.
Claim 2
Independent Claim
72 words
A method of treatment to reduce the depth of wrinkles in a patient's skin affected by intrinsic aging or photo-induced aging, said method comprising the step of applying a composition comprising about 2 to about 20% of ascorbic acid, about 1 to about 10% tyrosine, and about 0.5 to about 5% of a non-toxic zinc salt in a pharmaceutically acceptable carrier, said composition being applied topically to the locus of said wrinkles.
Claim 3
Dependent Claim
23 words
The method of claim 1 wherein the composition is applied topically once or twice daily to achieve and maintain dimunition of wrinkle depth.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-02 | 1994-01-01 | 1994-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-02 | 1998-01-01 | 1998-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-02 | 2002-01-01 | 2002-07-03 | $7700.00 | Window Closed / Lapsed |