US4784986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Skin treatment compositions and method of use thereof
Assignee: Polydex Pharmaceuticals Ltd
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Filing: 1986-10-30
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Granted: 1988-11-15
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Expires: 2006-10-30
Abstract
Abstract Cosmetic preparations comprising water soluble fatty acid amide derivatives of hydrolyzed collagen are found to have a substantial degree of permeability to the stratum corneum of human skin and to be effective in improving skin texture, moisture retention and minimizing wrinkles.
Inventors
- 👤 Thomas C. Usher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:27
CPC Classifications
A; A61; A61Q; A61Q19/00; A61Q19/08; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/64; A61K8/65; C; C08; C08H; C08H1/00; C08H1/06; C08L; C08L89/00; C08L89/04; C08L89/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
75 words
A cosmetic method for the treatment of skin by the deep absorption of a collagen derivative into the stratum corneum thereof which comprises applying to the skin an effective amount of a water soluble fatty acid amide of a water soluble hydrolysed collagen having a molecular weight in the range of about 1,000-10,000, and allowing said material to remain in contact with the skin for a sufficient period of time to effect substantial penetration thereof.
Claim 2
Dependent Claim
75 words
A cosmetic method for the treatment of skin by the deep absorption of a collagen derivative into the stratum corneum thereof which comprises applying to the skin an effective amount of a water soluble fatty acid amide of a water soluble hydrolysed collagen having a molecular weight in the range of about 1,000-10,000, and allowing said material to remain in contact with the skin for a sufficient period of time to effect substantial penetration thereof.
Claim 3
Dependent Claim
20 words
A method according to claim 1 wherein the said fatty acid amide is applied in the form of a lotion.
Claim 4
Dependent Claim
20 words
A method according to claim 1 where the said fatty acid amide is applied in the form of a cream.
Claim 5
Dependent Claim
40 words
A method according to claim 1 wherein said fatty acid amide is allowed to remain in contact with the skin for at least one hour in order to ensure deep penetration thereof beneath the surface layers of the stratum corneum.
Claim 6
Dependent Claim
46 words
A cosmetically acceptable composition for application to the skin which comprises a water soluble fatty acid amide of water soluble hydrolysed collagen having a molecular weight ranging between about 1000 and 10,000 capable of deep penetration of multiple layers of the stratum corneum of the skin.
Claim 7
Dependent Claim
46 words
A cosmetically acceptable composition for application to the skin which comprises a water soluble fatty acid amide of water soluble hydrolysed collagen having a molecular weight ranging between about 1000 and 10,000 capable of deep penetration of multiple layers of the stratum corneum of the skin.
References Cited (Backward Citations)
US3898129A
Cited
US4485037A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-11-15 | 1992-05-16 | 1992-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-15 | 1996-05-16 | 1996-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-15 | 2000-05-16 | 2000-11-15 | $7700.00 | Window Closed / Lapsed |