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:
Jul. 21, 1981
Filed:
Jan. 23, 1980
Kabushiki Kaisha Suwa Seikosha, Tokyo, JP;
Abstract
A new ester compound suitable for use in a liquid crystal composition is provided. The compound is a (2'-cyano-4'-alkyl)phenyl-3-chloro-4 alkoxybenzoate represented by the following formula: ##STR1## wherein R and R' are selected from straight-chain alkyl groups having from one to eight carbon atoms. The ester is not a liquid crystal compound, but upon addition to a liquid crystal composition increases the absolute value of the dielectric anisotropy in the high frequency range. Such compositions are particularly well suited for the two frequency matrix-addressing drive in a liquid crystal display for complex character and graphic displays. The esters are prepared by condensing an acid chloride having the general formula ##STR2## and a phenol having the general formula ##STR3## wherein R and R' are as defined above.