US3937810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
A skin lightening composition and method of using the same
Assignee: Lever Brothers Co
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Filing: 1974-06-12
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Granted: 1976-02-10
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Expires: 1994-06-12
Abstract
Abstract Skin can be lightened by application of a composition containing a skin lightening amount of niacin and a physiologically acceptable carrier. Such a composition contains from 0.2% to about 10% by weight of niacin and optionally also a compound which absorbs ultra-violet light in the range 290-360 nm to counteract the tanning and burning effect of sunlight.
Inventors
- 👤 Girish Prasad Mathur
- 👤 Kuruvakkat Kochu Govind Menon
- 👤 Srinivasan Varadarajan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:55
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/49; A61K8/494; A61K8/33; A61K8/35; A61K8/37; A61K8/67; A61K8/673; A61K8/675; A61Q; A61Q19/00; A61Q19/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
36 words
A method of lightening the skin which comprises applying to the skin a composition containing a skin lightening amount of niacin of from 0.2 to about 10% by weight and a physiologically acceptable carrier for niacin.
Claim 2
Independent Claim
36 words
A method of lightening the skin which comprises applying to the skin a composition containing a skin lightening amount of niacin of from 0.2 to about 10% by weight and a physiologically acceptable carrier for niacin.
Claim 3
Dependent Claim
47 words
A cosmetic composition for application to the skin comprising a skin lightening amount of niacin of from about 0.2 to about 10% by weight, from 0.1 to 10% by weight of urocanic acid absorbing in the range of 290-320 nm and a physiologically acceptable carrier for niacin.
Claim 4
Dependent Claim
47 words
A cosmetic composition for application to the skin comprising a skin lightening amount of niacin of from about 0.2 to about 10% by weight, from 0.1 to 10% by weight of urocanic acid absorbing in the range of 290-320 nm and a physiologically acceptable carrier for niacin.
Claim 5
Dependent Claim
98 words
A cosmetic composition for application to the skin comprising a skin lightening amount of niacin of from 0.2 to 10% by weight and from 0.1 to 4% by weight of an ultra-violet absorber absorbing in the range of 290-320 nm having the formula ##SPC3## wherein R 2 is alkyl having 1-4 carbon atoms, R 3 is alkyl having 4-10 carbon atoms, or an alkoxyalkyl group of the formula --R 4 --O--R 5 , wherein R 4 is alkylene having 1-4 carbon atoms and R 5 is alkyl having 1-4 carbon atoms and a physiologically acceptable carrier for niacin.
Claim 6
Dependent Claim
98 words
A cosmetic composition for application to the skin comprising a skin lightening amount of niacin of from 0.2 to 10% by weight and from 0.1 to 4% by weight of an ultra-violet absorber absorbing in the range of 290-320 nm having the formula ##SPC3## wherein R 2 is alkyl having 1-4 carbon atoms, R 3 is alkyl having 4-10 carbon atoms, or an alkoxyalkyl group of the formula --R 4 --O--R 5 , wherein R 4 is alkylene having 1-4 carbon atoms and R 5 is alkyl having 1-4 carbon atoms and a physiologically acceptable carrier for niacin.
Claim 7
Dependent Claim
65 words
A cosmetic composition for application to the skin comprising a skin lightening amount of niacin of from 0.2 to 10% by weight and from 0.1 to 4% by weight of an ultra-violet absorber absorbing in the range of 320-360 nm represented by the formula ##SPC4## wherein R is an alkyl group containing from 4 to 12 carbon atoms and a physiologically acceptable carrier for niacin.
Claim 8
Dependent Claim
65 words
A cosmetic composition for application to the skin comprising a skin lightening amount of niacin of from 0.2 to 10% by weight and from 0.1 to 4% by weight of an ultra-violet absorber absorbing in the range of 320-360 nm represented by the formula ##SPC4## wherein R is an alkyl group containing from 4 to 12 carbon atoms and a physiologically acceptable carrier for niacin.
References Cited (Backward Citations)
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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) | 1979-02-09 | 1979-08-11 | 1980-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-09 | 1983-08-11 | 1984-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-09 | 1987-08-11 | 1988-02-10 | $7700.00 | Window Closed / Lapsed |