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. 14, 1978
Filed:
Mar. 25, 1977
Applicant:
Inventors:
Dietrich Erdmann, Darmstadt, DT;
Rudolf Eidenschink, Darmstadt, DT;
Joachim Krause, Darmstadt, DT;
Ludwig Pohl, Darmstadt, DT;
Assignee:
Merck Patent Gesellschaft mit beschrankter Haftung, Darmstadt, DT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K / ; G02F / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
252299 ; 2604 / ; 350350 ;
Abstract
Biphenyl derivatives of the formula: ##STR1## wherein X is --CO--O-- or --O--CO--, R.sub.1 and R.sub.4 are alkyl of 1 to 10 carbon atoms, and one of R.sub.2 and R.sub.3 is CN and the other is H, are useful for lowering the dielectric anisotropy of liquid crystalline dielectrics.