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. 16, 1994
Filed:
Jan. 21, 1993
Applicant:
Inventors:
Tuong Huynh-ba, Baden, CH;
Maged A Osman, Zurich, CH;
Assignee:
Merck Patent GmbH, Darmstadt, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ; C09K / ; G02F / ;
U.S. Cl.
CPC ...
25229961 ; 544298 ; 544335 ;
Abstract
Liquid crystal mixtures comprise one compound of the formula: ##STR1## wherein --A is selected from the group consisting of ##STR2## wherein R.sub.1 is independently C1-12 straight or branched alkyl or C1-12 straight or branched alkoxy and R.sub.2 is independently C1-12 straight or branched alkyl, X is selected from the group consisting of fluorine, chlorine, bromine, iodine and nitrile, and n is 1 or 2. The mixtures exhibit improved properties for image displays.