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:
Feb. 12, 1985
Filed:
Jan. 28, 1983
Applicant:
Inventors:
Gunther Haas, Neckargemund, DE;
Georg Weber, Erzhausen, DE;
Assignee:
Merck Patent Gesellschaft mit beschrankter Haftung, Darmstadt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F / ; C09K / ;
U.S. Cl.
CPC ...
2522991 ; 2603 / ; 350349 ;
Abstract
A new liquid crystal dielectric contains at least one dyestuff of formula I ##STR1## wherein R.sup.1 and R.sup.2 are identical or different and each is alkyl or alkoxy each of 3 to 8 C atoms or a group Z--Y--, or one of R.sup.1 and R.sup.2 can also be hydrogen, methyl, ethyl, methoxy or ethoxy; Z is R--Ph--, R--Ph--Ph--, R--Cy--, R--Cy--Cy--, R--Cy--Ph-- or R--Ph--Cy--; Ph is 1,4-phenylene; Cy is 1,4-cyclohexylene; Y is --CH.sub.2 --, --O--, --S--, --NH--, --CH.sub.2 CH.sub.2 --, --CH.sub.2 --O--, --CH.sub.2 --S--, --CH.sub.2 --NH--, or a direct bond; and R is hydrogen or alkyl or alkoxy, each of 1-8 C atoms.