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:
Dec. 01, 1992
Filed:
Apr. 10, 1991
Applicant:
Inventors:
Takamasa Harada, Inzai, JP;
Norbert Rosch, Frankfurt am Main, DE;
Rainer Wingen, Hattersheim am Main, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K / ; C09K / ; C09K / ; C09K / ;
U.S. Cl.
CPC ...
25229901 ; 2522996 ; 2522995 ; 2522992 ;
Abstract
The occurrence of twist states in FLC displays can be suppressed by adding ionophores to FLC mixtures. Applicable ionophores are amides of the general formula I ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 e.g. are alkyl, cyclohexyl, phenyl or benzyl and X is alkylene with --CH.sub.2 -groups being replaced by --O--, 1,2-phenylene or 1,2-cyclohexylene.