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:
Mar. 29, 1994
Filed:
Feb. 24, 1992
Applicant:
Inventors:
Marie Vergnolle, Palaiseau, FR;
Francoise Soyer, Villebon Sur Yvette, FR;
Pierre Le Barny, Orsay, FR;
Jean-Claude Dudois, St. Remy Les Chevreuse, FR;
Assignee:
Thomson-CSF, Puteaux, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K / ; C09K / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
25229963 ; 25229966 ; 568631 ; 568647 ; 570144 ;
Abstract
The disclosure relates to fluorinated chiral liquid crystals that incorporate a cyclohexyl grouping in their structure. They can be used as dopants and lead to mixtures of ferroelectric liquid crystals that have an application in display systems. They meet the following chemical formula. ##STR1## with 1.ltoreq.n.ltoreq.14 if X=CH.sub.2 Y=--CH.sub.2 -- with R=CmH.sub.2m+1 and 5.ltoreq.m.ltoreq.16 ##STR2##