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US4659740A
Expired / Lapsed
US
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Cosmetic preparations comprising novel elastin derivatives
Assignee: POLYDEX PHARMACEUTICALS Ltd A Co OF BAHAMAS
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Filing: 1985-02-14
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Granted: 1987-04-21
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Expires: 2005-02-14
Abstract
Abstract This invention relates to a cosmetic preparation which comprises novel derivatives of solubilized elastin which are fatty acid amides of elastin, and which have been found to permit deeper penetration and a higher percentage absorption of elastin into the stratum corneum of human skin.
Inventors
- 👤 Thomas C. Usher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:04
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/64; A61Q; A61Q19/00; C; C08; C08H; C08H1/00; A61Q19/08
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
33 words
A cosmetic preparation for application to the skin which comprises a fatty acid amide of solubilized elastin in which the fatty acid moiety is attached to an N-terminal group of the elastin molecule.
Claim 2
Dependent Claim
33 words
A cosmetic preparation for application to the skin which comprises a fatty acid amide of solubilized elastin in which the fatty acid moiety is attached to an N-terminal group of the elastin molecule.
Claim 3
Dependent Claim
19 words
A cosmetic preparation according to claim 1 wherein the fatty acid amide is the lauric acid amide of elastin.
Claim 4
Dependent Claim
19 words
A cosmetic preparation according to claim 1 wherein the fatty acid amide is the palmitic acid amide of elastin.
Claim 5
Dependent Claim
19 words
A cosmetic preparation according to claim 1 wherein the fatty acid amide is the oleic acid amide of elastin.
Claim 6
Dependent Claim
51 words
A derivative of elastin which is capable of substantial penetration of the stratum corneum of human skin which is the reaction product of solubilized elastin with a fatty acid anhydride to produce the corresponding amide in which the fatty acid moiety is attached to the N-terminal group of the elastin molecule.
Claim 7
Dependent Claim
51 words
A derivative of elastin which is capable of substantial penetration of the stratum corneum of human skin which is the reaction product of solubilized elastin with a fatty acid anhydride to produce the corresponding amide in which the fatty acid moiety is attached to the N-terminal group of the elastin molecule.
Claim 8
Independent Claim
58 words
A method for the manufacture of a fatty acid amide of elastin having a substantial degree of penetrability of human epidermous which comprises reacting hydrolyzed elastin with a fatty acid anhydride in aqueous solution to attach the fatty acid moiety to an N-terminal group of the elastin molecule and recovering the fatty acid amide of elastin produced thereby.
Claim 9
Independent Claim
58 words
A method for the manufacture of a fatty acid amide of elastin having a substantial degree of penetrability of human epidermous which comprises reacting hydrolyzed elastin with a fatty acid anhydride in aqueous solution to attach the fatty acid moiety to an N-terminal group of the elastin molecule and recovering the fatty acid amide of elastin produced thereby.
Claim 10
Dependent Claim
28 words
A method according to claim 6 wherein the fatty acid anhydride is the anhydride of lauric acid and the resulting product is the lauric acid amide of elastin.
Claim 11
Dependent Claim
28 words
A method according to claim 6 wherein the fatty acid anhydride is the anhydride of palmitic acid and the resulting product is the palmitic acid amide of elastin.
Claim 12
Dependent Claim
28 words
A method according to claim 6 wherein the fatty acid anhydride is the anhydride of oleic acid and the resulting product is the oleic acid amide of elastin.
Claim 13
Dependent Claim
11 words
An amide of elastin prepared by the method of claim 6.
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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) | 1990-04-20 | 1990-10-20 | 1991-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-20 | 1994-10-20 | 1995-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-20 | 1998-10-20 | 1999-04-21 | $7700.00 | Window Closed / Lapsed |