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:
Apr. 07, 1987
Filed:
May. 06, 1981
Applicant:
Inventors:
Isao Yamatsu, Kawaguchi, JP;
Yuichi Inai, Tokyo, JP;
Shinya Abe, Nakamura, JP;
Takeshi Suzuki, Abiko, JP;
Yoshikazu Suzuki, Ichinomiya, JP;
Osamu Tagaya, Gifu, JP;
Kouichi Suzuki, Kakamigahara, JP;
Kouichi Abe, Fuchu, JP;
Kouji Yamada, Tokyo, JP;
Assignee:
Eisai Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
260404 ; 2604045 ; 2604 / ; 260413 ;
Abstract
A conjugated polyprenylcarboxylic acid and its derivative having the formula: ##STR1## in which each of n and m is 0, 1 or 2, n+m is 1 or 2, A is ##STR2## and R is the hydroxyl group, a lower alkoxy group or ##STR3## wherein each of R.sub.1 and R.sub.2 represents the hydrogen atom, a lower alkyl group, or an aryl group; provided that R is ##STR4## if A is ##STR5## n is 1 and m is 0.