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:
Jun. 25, 1991
Filed:
Mar. 20, 1990
Applicant:
Inventor:
Tsuyoshi Obikawa, Suwa, JP;
Assignee:
Seiko Epson Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; G02F / ; C09K / ;
U.S. Cl.
CPC ...
549369 ; 25229961 ;
Abstract
2-(3', 4'-difluorophenyl)-1,3-dioxane derivatives represented by the general formula: ##STR1## wherein R is a linear alkyl group having from 1 to 8 atoms, and having large positive dielectric constant anisotropy (.DELTA..epsilon.) and small refractive index anisotropy (.DELTA.n). The dioxane derivatives may be included in liquid crystal compositions for improved display devices having a low threshold voltage, a low driving voltage and a wide visual angle.