The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 31, 1994
Filed:
Dec. 03, 1992
Applicant:
Inventors:
Takahiro Hara, Machida, JP;
Seigo Takasawa, Hatano, JP;
Yoshiharu Yokoo, Sagamihara, JP;
Tadayasu Furukawa, Chesterfield, MO (US);
Assignee:
Kyowa Hakko Kogyo Co., Ltd., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61K / ;
U.S. Cl.
CPC ...
424401 ; 424 63 ;
Abstract
Disclosed is a whitening cosmetic composition comprising .gamma.-L-glutamyl-L-cystine, .gamma.-L-glutamyl-L-cysteine disulfide, oxidized glutathione or a derivative thereof, the amino group of which is acylated with an alkanoyl group or an aroyl group. The whitening cosmetic composition of the present invention have extremely good in water solubility and heat stability and stability during storage and show a melanin formation inhibitory activity against melanoma cells without any cytotoxicity.