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. 20, 1990
Filed:
Sep. 07, 1988
Applicant:
Inventors:
Kazuhiko Sakaguchi, Toyonaka, JP;
Naoya Kasai, Amagasaki, JP;
Yoshikazu Takehira, Itami, JP;
Tohru Kitamura, Kyoto, JP;
Yutaka Shiomi, Amagasaki, JP;
Assignee:
Daiso Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K / ; C07D / ; C07D / ; C07D / ;
U.S. Cl.
CPC ...
25229961 ; 25229901 ; 544298 ; 544335 ; 549322 ; 549323 ; 549508 ; 549560 ;
Abstract
Liquid crystalline compounds having an optically active .gamma.-lactone ring of the formula: ##STR1## wherein R.sup.1 is a group selected from the group consisting of ##STR2## n and e are each independently 0 or 1; R.sup.3 is an alkyl group having 1 to 15 carbon atoms; R.sup.2 is a group of the formula: --(CO).sub.m --R.sup.4 ; m is 0 or 1; R.sup.4 is hydrogen atom or an alkyl having 1 to 15 carbon atoms; and the symbol * is an asymmetric carbon atom, and an intermediate thereof, and process for the production of the same.