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:
Jan. 25, 1994
Filed:
Feb. 12, 1992
Applicant:
Inventors:
Hiroyuki Nohira, Urawa, JP;
Takao Takiguchi, Tokyo, JP;
Takashi Iwaki, Machida, JP;
Takeshi Togano, Yokohama, JP;
Yoko Yamada, Atsugi, JP;
Shinichi Nakamura, Atsugi, JP;
Akira Sakaigawa, Urawa, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K / ; C09K / ; C07D / ; G02F / ;
U.S. Cl.
CPC ...
25229961 ; 25229966 ; 25229967 ; 544242 ; 544298 ; 544335 ; 359103 ; 359104 ;
Abstract
An optically active compound represented by the following formula (I): ##STR1## wherein R.sub.1 denotes an alkyl or alkoxy group having 1-18 carbon atoms; R.sub.2 denotes an alkyl group having 1-12 carbon atoms; A denotes ##STR2## X denotes and C* denotes an optically active asymmetric carbon atom. The optically active compound, when included as a component, provides a ferroelectric liquid crystal composition or device showing an improved electro-field response characteristic.