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:
Aug. 21, 1984
Filed:
Jan. 04, 1982
Applicant:
Inventors:
Walter Ditter, Heidelberg, DE;
Karl-Heinz Etzbach, Mannheim, DE;
Dieter Horn, Heidelberg, DE;
Manfred Patsch, Wachenheim, DE;
Heinz Eilingsfeld, Frankenthal, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Primary Examiner:
Int. Cl.
CPC ...
C09K / ; G02F / ;
U.S. Cl.
CPC ...
2522991 ; 350349 ;
Abstract
The use of a dye of the general formula I ##STR1## where R is a heterocyclic radical, X is hydrogen, nitro, or unsubstituted or substituted amino, hydroxyl or mercapto and Y is hydrogen, nitro, or unsubstituted or substituted amino, hydroxyl or mercapto, and the ring A can be additionally substituted, in an electro-optical display containing liquid crystals, and a liquid-crystal mixture containing a dye of the general formula in claim 1.