Patent US4369174A successfully refreshed from Google Patents.
US4369174A
Expired / Lapsed
US
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Cosmetic composition containing kojic acid ester
Assignee: Sansho Pharmaceutical Co Ltd
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Filing: 1980-10-24
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Granted: 1983-01-18
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Expires: 2000-10-24
Abstract
Abstract A cosmetic composition containing a kojic acid ester with an aliphatic carboxylic acid, which is desirable for application to the skin. The kojic acid ester has an excellent effect of whitening the skin and an excellent anti-suntan effect.
Inventors
- 👤 Sumiyoshi Nagai
- 👤 Tokio Izumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:34
CPC Classifications
C; C07; C07D; C07D309/00; C07D309/34; C07D309/36; C07D309/40; A; A61; A61K; A61K8/00; A61K8/18; A61K8/19; A61K8/22; A61K8/27; A61K8/30; A61K8/40; A61K8/44; A61K8/49; A61K8/4906; A61K8/4926; A61K8/4973; A61K8/498; A61K8/72; A61K8/81; A61K8/8141; A61K8/8147; A61Q; A61Q19/00; A61Q19/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
In a skin whitening cosmetic composition comprising an aqueous composition of a tyrosinase and suntanning inhibition compound in the form of a lotion, creme, pack or milk lotion, the improvement comprising 0.01 to 10% by weight of the cosmetic composition of the diester of kojic acid having the following formula as the tyrosinase and suntanning inhibition compound: ##STR8## wherein R is an aliphatic group containing from 3 to 20 carbon atoms.
Claim 2
Dependent Claim
71 words
In a skin whitening cosmetic composition comprising an aqueous composition of a tyrosinase and suntanning inhibition compound in the form of a lotion, creme, pack or milk lotion, the improvement comprising 0.01 to 10% by weight of the cosmetic composition of the diester of kojic acid having the following formula as the tyrosinase and suntanning inhibition compound: ##STR8## wherein R is an aliphatic group containing from 3 to 20 carbon atoms.
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) | 1986-01-17 | 1986-07-19 | 1987-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-17 | 1990-07-19 | 1991-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-17 | 1994-07-19 | 1995-01-18 | $7700.00 | Window Closed / Lapsed |