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:
Jan. 29, 1991
Filed:
May. 26, 1988
Gunter Scherowsky, Berlin, DE;
Jurgen Gay, Berlin, DE;
Hans-Rolf Dubal, Konigstein/Taunus, DE;
Claus Escher, Muhltal, DE;
Wolfgang Hemmerling, Sulzbach, DE;
Ingrid Muller, Hofheim am Taunus, DE;
Dieter Ohlendorf, Liederbach, DE;
Rainer Wingen, Hattersheim am Main, DE;
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Abstract
Optically active oxirane-2-carboxylic acid esters with a mesogenic molecular component suitable as dopants in liquid-crystal mixtures. They result in liquid-crystalline ferroelectric phases with short switching times and in electroclinic phases with large electroclinic coefficients. A further advantage lies in the fact that they induce a helix with a very small pitch so that they are also suitable for helix compensation in LC mixtures.