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:
Aug. 27, 1991
Filed:
Mar. 20, 1989
Applicant:
Inventors:
Seiichi Takano, Izumi, JP;
Kunio Ogasawara, Sendai, JP;
Toshihiro Shibata, Omiya, JP;
Norio Kurosawa, Urawa, JP;
Assignee:
Adeka Argus Chemical Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K / ; C09K / ; C09K / ;
U.S. Cl.
CPC ...
25229961 ; 25229962 ; 25229964 ;
Abstract
An optically active bisaryl compound represented by the general formula (I): ##STR1## wherein Ar.sub.1 and Ar.sub.2 represent each a phenyl, naphthyl, biphenyl or pyrimidylphenyl group optionally substituted with an alkyl, alkoxy, cyano or cycloalkyl group or a halogen atom, and * represents an asymmetric carbon atom, which can give a cholesteric phase of a short helical pitch when added to nematic liquid crystals useful as a component of a liquid crystal mixture for a display device.