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. 03, 1991
Filed:
Feb. 14, 1990
Applicant:
Inventors:
Assignee:
Chisso Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K / ; C09C / ; C07C / ;
U.S. Cl.
CPC ...
25229967 ; 25229901 ; 560 59 ; 560 62 ; 560 64 ; 560 65 ; 558425 ; 570129 ;
Abstract
A benzoic acid derivative having a large positive dielectric anisotropy value and a superior compatibility, reducing the threshold voltage value of the resulting liquid crystal cell and being very effective for broadening the mesomorphic range of the resulting liquid crystal composiiton and reducing the driving voltage, and a liquid crystal composition containing the derivative are provided, which benzoic acid derivative is expressed by the formula ##STR1## wherein R represents an alkyl group of 1 to 10 carbon atoms and A represents ##STR2##