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:
May. 25, 1993
Filed:
Nov. 18, 1991
Applicant:
Inventors:
Yasuyuki Goto, Chiba, JP;
Makoto Ushioda, Chiba, JP;
Assignee:
Chisso Corporation, Ohsaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K / ; C07D / ;
U.S. Cl.
CPC ...
25229961 ; 544224 ;
Abstract
The present invention provides a liquid crystalline compound having a large negative dielectric anisotropy value, a low viscosity and a large birefringence value and a liquid crystal composition suitable as an element constituting light switching elements. The liquid crystalline compound is expressed by the formula ##STR1## wherein R.sup.1 and R.sup.2 each independently represent an alkyl group or an alkoxy group each of 1 to 15 carbon atoms and Y.sub.1 and Y.sup.2 each independently represent H or F.