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:
Sep. 24, 1985
Filed:
Sep. 30, 1982
Applicant:
Inventors:
Assignee:
Alps Electric Co., Ltd., , JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ; G02F / ;
U.S. Cl.
CPC ...
2522991 ; 2522992 ; 2522993 ; 2522995 ; 350349 ;
Abstract
In a liquid crystal mixture comprising a nematic liquid crystal having negative dielectric anisotropy, an optically active substance such as cholesteric or chiral nematic liquid crystal, a dichroic dye and an ionic substance, the present invention is characterized by use of 3,5-dinitrobenzoic acid having the following structural formula as the ionic substance: ##STR1##