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:
Nov. 17, 1998
Filed:
Jan. 30, 1997
Applicant:
Inventors:
Volker Reiffenrath, Rossdorf, DE;
Herbert Plach, Darmstadt, DE;
Detlef Pauluth, Darmstadt, DE;
Reinhard Hittich, Modautal 1, DE;
Eike Poetsch, Muhltal 6, DE;
Thomas Geelhaar, Mainz, DE;
Georg Weber, Erzhausen, DE;
Ekkehard Bartmann, Erzhausen, DE;
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ; C09K / ; C09K / ; C07C / ;
U.S. Cl.
CPC ...
25229963 ; 25229901 ; 25229966 ; 570144 ;
Abstract
Liquid-crystalline compounds of the formula I ##STR1## R is H, an alkyl or alkylene radical, Z.sup.1 and Z are each, independently of one another, --CH.sub.2 CH.sub.2 --, --CH.dbd.CH--,--C.tbd.C-- or a single bond, and one of the radicals Z.sup.1 and Z is alternatively --(CH.sub.2).sub.4 -- or --CH.dbd.CH--CH.sub.2 CH.sub.2 --,