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. 25, 1983
Filed:
Nov. 12, 1981
Siegfried Aftergut, Schenectady, NY (US);
Herbert S Cole, Scotia, NY (US);
General Electric Company, Schenectady, NY (US);
Abstract
Novel asymmetric tris-azo dye compositions and a liquid crystal composition containing the asymmetric tris-azo dye compositions are disclosed. The asymmetric dye compositions having asymmetric terminal groups have the general formula: ##STR1## wherein R.sub.1 is one of the three following groups: ##STR2## 5-nitrothiazolyl group, 4-cyanophenyl group, and 4-nitrophenyl; wherein R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are selected from the group consisting of hydrogen, alkyl, halogen and alkoxy, and R.sub.6 is selected from the group consisting of N,N-diethylamino-3-methylphenyl; N,N-diethylamino-3-methylphenyl; N,N-diethylamino-3,5-dimethylphenyl; 2-pentylperimidyl; N-ethylamino-1-naphthyl; N,N-dimethylamino-1-naphthyl; and N,N-diethylamino-1-naphthyl. When the asymmetric tris-azo dichroic dyes are used as a guest in a host liquid crystal material, they form a novel liquid crystal composition for use in liquid crystal displays.