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. 23, 1999
Filed:
Jan. 12, 1998
Applicant:
Inventors:
Karl-Heinz Etzbach, Frankenthal, DE;
Paul Delavier, Mundenheimer, DE;
Karl Siemensmeyer, Frankenthal, DE;
Gerhard Wagenblast, Wachenheim, DE;
Lothar Laupichler, Heidelberg, DE;
Volkmar Vill, Hamburg, DE;
Assignee:
BASF Aktiengesellschaft, Ludwigshafen, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
585 25 ; 585 26 ; 585 27 ; 544224 ; 544242 ; 546249 ; 548136 ; 548143 ; 549 29 ; 25229901 ; 25229961 ; 25229962 ; 25229966 ; 570125 ; 570127 ; 570182 ; 570183 ; 568924 ; 568928 ; 568929 ;
Abstract
The invention relates to chiral compounds containing at least one divalent or polyvalent chiral group, at least one polymerizable group, at least one spacer and at least one mesogenic group, and to their use as polymerizable, chiral dopes for the preparation of cholesteric networks. The novel compounds are suitable for use in electro-optical displays or as chiral dopes for nematic or cholesteric liquid crystals in order to produce layers which reflect in colors.