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:
Nov. 01, 1994
Filed:
Nov. 08, 1991
Applicant:
Inventors:
Wen-Liang Tsai, Hsinchu, TW;
Hwei-Long Kuo, Taipei, TW;
Assignee:
Industrial Technology Research Institute, Hsinchu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ; C09K / ; C07C / ; G02F / ;
U.S. Cl.
CPC ...
25229901 ; 25229964 ; 25229965 ; 25229966 ; 25229967 ; 560 59 ; 560 64 ; 560 84 ; 560 87 ; 560180 ; 568583 ; 568659 ; 359 10 ;
Abstract
An optically active lactic acid derivative having the formula (1a): ##STR1## wherein A is O or S; B is --(CH.sub.2).sub.m -- or --(CH.sub.2).sub.n --O; R1 is an alkoxy group having 1-22 carbon atoms, a phenolate, a substituted phenolate, a hydroxy group, or a halogen atom; R2 is an alkyl group having 2-8 carbon atoms; m is 0, 1, 2, 3 or 4; n is 2, 3, 4 or 5; C* is an asymmetric carbon atom. Liquid crystal compositions and liquid crystal devices containing the above mentioned derivatives are also disclosed.