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. 01, 1992
Filed:
Jul. 16, 1990
Applicant:
Inventors:
Teruo Kitamura, Katsuta, JP;
Katsumi Kondo, Katsuta, JP;
Akio Mukoh, Mito, JP;
Koichi Matsumura, Ibaraki, JP;
Mitsuru Kawada, Amagasaki, JP;
Yoshihiro Sugihara, Toyonaka, JP;
Assignees:
Hitachi, Ltd., Tokyo, JP;
Takeda Chemical Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
25229965 ; 25229966 ; 25229963 ; 25229961 ; 560 59 ; 560 60 ; 560 73 ; 560102 ; 560108 ; 560109 ; 560141 ;
Abstract
There are disclosed an optically active compound represented by the general formula: ##STR1## wherein n, R.sub.1, R.sub.2, R.sub.3, R.sub.4, Q.sub.1, Q.sub.2, Q.sub.3, and M are defined as in the detailed explanation, and *-marked carbon atoms are each an asymmetric carbon atom; a liquid crystal composition comprising at least one optically active compound of said general formula and a liquid crystal optical modulator using the composition thereof.