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:
Oct. 01, 1991
Filed:
Mar. 21, 1990
Applicant:
Inventors:
Assignee:
Arakawa Kagaku Kogyo Kabushiki Kaisha, Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ; C09K / ;
U.S. Cl.
CPC ...
544334 ; 544335 ; 549372 ; 549373 ; 549375 ; 549423 ; 549420 ; 560 61 ; 25229901 ; 2522992 ; 568608 ;
Abstract
Optical active compounds of the formula (1), (2), (3) and (4): ##STR1## The compounds (1), (2) and (3) are useful as raw materials of chiral dopants to be added for forming liquid crystal compositions, medicines or agricultural chemicals, and the compound (4) is useful as chiral dopants to be added for forming liquid crystal compositions.