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. 13, 1990
Filed:
May. 09, 1989
Applicant:
Inventors:
Toshihiro Hirai, Toda, JP;
Atsushi Yoshizawa, Toda, JP;
Isa Nishiyama, Toda, JP;
Mitsuo Fukumasa, Toda, JP;
Nobuyuki Shiratori, Toda, JP;
Akihisa Yokoyama, Toda, JP;
Assignee:
Nippon Mining Co., Ltd., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09K / ; C07C / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
25229966 ; 25229967 ; 25229901 ; 558270 ; 560141 ; 568331 ;
Abstract
This invention provides novel biphenyl compounds represented by the following general formula (I): ##STR1## (wherein R is an alkyl group, A is selected from the single bond, --COO--, --OCO--, --OCOO-- and --CO--, and each of m and n is an integer of 1 or more, provided m<n), optically active bodies thereof, liquid crystal compositions containing at least one of these compounds, light switching elements comprising at least one of the above compounds as a constituent element, and a method of producing the compound.