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:
Aug. 07, 1990
Filed:
Nov. 22, 1988
Yukihisa Goto, Himeji, JP;
Kazuhisa Masamoto, Himeji, JP;
Hiroshi Yagihara, Himeji, JP;
Yasuo Morishima, Himeji, JP;
Hirokazu Osabe, Himeji, JP;
Daicel Chemical Industries Ltd., Osaka, JP;
Abstract
A compound of the formula (I) ##STR1## or a salt thereof, wherein R is hydrogen atom, or a group of --(CH.sub.2).sub.n --R.sub.1 wherein n is an integer from 1 to 3 and R.sub.1 is hydrogen atom, hydroxy group, a lower alkoxy group, mercapto group, a lower alkylthio group, amino group, a di-lower alkylamino group, a C.sub.3-11 alkyl group, a lower alkenyl group, a lower alkynyl group, a cycloalkyl group, a 5- or 6-membered heterocyclic group, or a phenyl group which may be substituted by one or two substituents of a halogen, a lower alkyl or a lower alkoxy;