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:
Oct. 29, 1991
Filed:
Jun. 27, 1989
Tsuyoshi Obikawa, Nagano, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
2'-fluoro-4'-trans-cyclohexyl-terphenyl derivatives represented by the general formula: ##STR1## wherein the cyclohexyl is the trans isomer, R is a straight chain alkyl having from 1 to 12 carbon atoms, X is a straight chain alkyl having from 1 to 12 carbon atoms, a straight chain alkoxy having from 1 to 12 carbon atoms or --CN and the compounds exhibit the nematic phase. The fluoro-cyclohexyl-terphenyl derivatives have a low crystal-nematic phase transition temperature (C-N point), a high nematic phase-isotropic liquid phase transition temperature (N-I point) and low viscosity and may be included in liquid crystal compositions for improved display devices having a wide temperature range, a low driving voltage and a rapid response speed.