US4609544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for tanning the skin
Assignee: Repligen Corp
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Filing: 1983-07-05
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Granted: 1986-09-02
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Expires: 2003-07-05
Abstract
Abstract The subject invention concerns a novel, unobvious, and useful composition of matter and method for tanning the human epidermis. The composition comprises a suitable dye precursor, peroxidase and H 2 O 2 . These ingredients, when reacted together on the skin, result in the formation of melanin-like dyes which tan the skin.
Inventors
- 👤 Walter C. Herlihy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:18
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/64; A61K8/66; A61K8/19; A61K8/22; A61K8/33; A61K8/34; A61K8/347; A61K8/40; A61K8/44; A61K8/445; A61K8/49; A61K8/4906; A61K8/4913; A61K8/492; A61Q; A61Q19/00; A61Q19/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
97 words
A method of tanning the human epidermis which comprises applying to said epidermis a composition comprising a cosmetic base in the form of a lotion, a cream, or an ointment, an effective amount of a dye precursor selected from the group consisting of tyrosine, 3,4-dihydroxy phenylalanine (dopa), D-dopa, aniline, catechol, 5-hydroxyindole, tyramine, dopamine, m-aminophenol, o-aminophenol, p-aminophenol, 4-aminocatechol, 2-hydroxy-1,4-naphthaquinone (henna), 4-methyl catechol, 3l-methyl catechol, 3-isopropyl 6-methyl catechol, 3,4-dihydroxybenzylamine, 3,4-dihydroxybenzoic acid, 1,2-dihydroxynaphthalene, gallic acid, resorcinol, 2-chloroaniline, p-chloroanisole, 2-amino-p-cresol, 4,5-dihydroxynaphthalene 2,7-disulfonic acid, o-cresol, m-cresol, p-cresol, distributed through said base, an effective amount of peroxidase and H 2 O 2 .
Claim 2
Independent Claim
97 words
A method of tanning the human epidermis which comprises applying to said epidermis a composition comprising a cosmetic base in the form of a lotion, a cream, or an ointment, an effective amount of a dye precursor selected from the group consisting of tyrosine, 3,4-dihydroxy phenylalanine (dopa), D-dopa, aniline, catechol, 5-hydroxyindole, tyramine, dopamine, m-aminophenol, o-aminophenol, p-aminophenol, 4-aminocatechol, 2-hydroxy-1,4-naphthaquinone (henna), 4-methyl catechol, 3l-methyl catechol, 3-isopropyl 6-methyl catechol, 3,4-dihydroxybenzylamine, 3,4-dihydroxybenzoic acid, 1,2-dihydroxynaphthalene, gallic acid, resorcinol, 2-chloroaniline, p-chloroanisole, 2-amino-p-cresol, 4,5-dihydroxynaphthalene 2,7-disulfonic acid, o-cresol, m-cresol, p-cresol, distributed through said base, an effective amount of peroxidase and H 2 O 2 .
Claim 3
Dependent Claim
23 words
A method, according to claim 1, wherein said dye precursor is present at a concentration of about 10 mM to about 1 M.
Claim 4
Dependent Claim
35 words
A method, according to claim 1, wherein said peroxidase is present at a concentration of about 1 to about 100 U/ml in a solution containing about 0.1 to about 1% H 2 O 2 .
Claim 5
Dependent Claim
12 words
A method, according to claim 1, wherein said peroxidase is horseradish peroxidase.
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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) | 1989-09-01 | 1990-03-03 | 1990-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-01 | 1994-03-03 | 1994-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-01 | 1998-03-03 | 1998-09-02 | $7700.00 | Window Closed / Lapsed |