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:
Nov. 16, 1993
Filed:
Aug. 21, 1990
Applicant:
Inventors:
Yutaka Mishima, Sowa-cho, Nada-ku, Kobe-shi, Hyogo, JP;
Yasuaki Oyama, Fukuoka, JP;
Masashi Kurimoto, Okayama, JP;
Assignees:
Kabushiki Kaisha Hayashibara Seibutsu Kagaku Kenkujo, Okayama, JP;
Sansho Seiyaku Kabushiki Kaisha, Fukuoka, JP;
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61K / ;
U.S. Cl.
CPC ...
424 62 ; 424 63 ; 424403 ;
Abstract
Lactic acid and its derivatives such as D-lactic acid, L-lactic acid, DL-lactic acid, and their nonmetallic derivatives and lactates of alkali metal or alkaline earth metal exhibit a strong skin-whitening effect at a concentration of 5 w/w % or higher in pigment cell. The skin-whitening effect is augmented by unsaturated fatty acids having a carbon number of 12-22.