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:
Dec. 18, 1990
Filed:
Dec. 24, 1985
Itsuro Motegi, Ichikaimachi, JP;
Michio Kawai, Ichikaimachi, JP;
Genji Imokawa, Utsunomiya, JP;
Koichi Nakamura, Tochigi, JP;
Naotake Takaishi, Utsunomiya, JP;
Kao Corporation, Tokyo, JP;
Abstract
A melanin inhibitor comprising as the reactive component a cinnamic acid derivative of the formula (I) or (II): ##STR1## in which R' represents an acyl group having 2 to 6 carbon atoms, R.sub.1 represents a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group or an alkenyl group, and R.sub.2 represents a hydrogen atom, an alkyl group having 1 to 24 carbon atoms, a cycloalkyl group or an alkenyl group. The melanin inhibitors according to the invention are locally applied to affected portions such as of freckles and pigmentary deposits after sunburn without giving any stimulative or allergic troubles to the skin.