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. 14, 1977
Filed:
Jun. 17, 1976
Applicant:
Inventors:
Dragan Milan Gavrilovic, Cranbury, NJ (US);
Daniel Louis Ross, Princeton, NJ (US);
Assignee:
RCA Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K / ; G02F / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
252299 ; 252408 ; 260463 ; 2604 / ; 2604 / ; 2604 / ; 3501 / ;
Abstract
Liquid crystal compounds of the formula ##STR1## wherein X can be alkyl (R-), alkoxy (RO-), acyloxy ##STR2## or alkylcarbonato ##STR3## wherein R is an alkyl group from 1-10 carbon atoms, and R.sub.1 -R.sub.3 can be hydrogen, methyl or halogen with the proviso that at least one and no more than two of R.sub.1 -R.sub.3 are substituents other than hydrogen, have positive dielectric anisotropy and are useful in electro-optic devices which comprise a thin liquid crystal layer between two closely spaced parallel electrodes.