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:
Jul. 29, 1997
Filed:
May. 30, 1995
Applicant:
Inventors:
Gunter Scherowsky, Berlin, DE;
Jurgen Gay, Berlin, DE;
Rainer Wingen, Hattersheim am Main, DE;
Hans-Rolf Dubal, Konigstein/Taunus, DE;
Claus Escher, Muhltal, DE;
Wolfgang Hemmerling, Sulzbach, DE;
Yoshio Inoguchi, Tokyo, JP;
Ingrid Muller, Hofheim am Taunus, DE;
Dieter Ohlendorf, Liederbach, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ;
U.S. Cl.
CPC ...
25229961 ;
Abstract
Optically active 1,3-dioxolane derivatives which carry a mesogenic radical in the 4-position and have the general formula (I) ##STR1## are suitable for use as doping agents in liquid-crystal mixtures--in particular ferroelectric liquid-crystal mixtures. The symbols in the general formula have the following meanings: