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. 14, 1993
Filed:
Apr. 15, 1993
Applicant:
Inventors:
Koichi Matsumura, Ibaraki, JP;
Mitsuru Kawada, Amagasaki, JP;
Yoshitaka Uesugi, Ohtsu, JP;
Yuka Sudo, Kasama, JP;
Katsumi Kondo, Katsuta, JP;
Teruo Kitamura, Katsuta, JP;
Assignees:
Takeda Chemical Industries, Osaka, JP;
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K / ; C09K / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
25229963 ; 25229961 ; 25229965 ; 25229966 ; 25229967 ; 544302 ; 544305 ; 544310 ; 560-9 ; 560 19 ; 560 61 ; 560 76 ; 560 87 ;
Abstract
The invention relates to optically active compounds represented by the general formula ##STR1## wherein R.sub.1, R.sub.2, Q.sub.1, Q.sub.2, Q.sub.3, ##STR2## and M are defined as in the specification, methods and intermediates for their preparation, liquid crystal compositions comprising at least one optically active compound of formula I and their use in electrooptical display, switching and modulation devices.