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:
Oct. 11, 1994
Filed:
Apr. 17, 1992
Applicant:
Inventors:
Wolfgang Hemmerling, Sulzbach, DE;
Ingrid Muller, Hofheim am Taunus, DE;
Hans-Rolf Dubal, Konigstein, DE;
Claus Escher, Muhltal, DE;
Gerhard Illian, Frankfurt am Main, DE;
Mikio Murakami, Konigstein, DE;
Dieter Ohlendorf, Liederbach, DE;
Rainer Wingen, Hattersheim am Main, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, US;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ;
U.S. Cl.
CPC ...
25229961 ; 544238 ; 544241 ; 544296 ; 544315 ; 544318 ; 544334 ; 544335 ; 544357 ; 544408 ; 544409 ; 546256 ; 546258 ; 546263 ; 546286 ; 546288 ; 546289 ; 546290 ; 2522996 ;
Abstract
Use of optically active carboxylic esters of oxygen-containing heterocycles as doping substances in liquid crystal mixtures and liquid crystal mixtures containing them. Optically active 1,3-dioxolane-4-carboxylic esters and oxirane-2-carboxylic esters of the general formula (I)