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:
Mar. 21, 1995
Filed:
Aug. 04, 1993
Applicant:
Inventors:
Yasutaka Miura, Takatsuki, JP;
Yasuhiro Kinoshita, Neyagawa, JP;
Yoshikazu Yamamoto, Neyagawa, JP;
Kunio Takahashi, Urawa, JP;
Kiyotaka Koyama, Higashikurume, JP;
Kaoru Takatori, Higashikurume, JP;
Assignee:
Nippon Paint Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
568766 ; 568722 ; 568763 ; 568772 ;
Abstract
Disclosed is a chemically stable tyrosinase activity inhibitor having high tyrosinase activity inhibition effect and low toxicity. The tyrosinase activity inhibitor has a structure of the formula: ##STR1## wherein R.sub.1, R.sub.3 and R.sub.4 are a hydrogen atom or an alkyl or alkenyl group having 1 to 9 carbon atoms, and R.sub.2 is an alkyl or alkenyl group having 2 to 9 carbon atoms.