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:
Jul. 25, 2000
Filed:
Jul. 14, 1993
Shigeru Mitsuhashi, Tokyo, JP;
Yoshimasa Matsushima, Tokyo, JP;
Takashi Imai, Kanagawa, JP;
Kiichi Mori, Kanagawa, JP;
Mamoru Yamada, Kanagawa, JP;
Hiroshi Sugiyama, Tokyo, JP;
Misao Yagi, Tokyo, JP;
Hitoshi Kondo, Tokyo, JP;
Toshimitsu Hagiwara, Tokyo, JP;
Takasago International Corporation, Tokyo, JP;
Abstract
An optically active compound represented by formula (I): wherein A represents ##STR1## wherein R.sup.2 represents an alkyl group having from 8 to 12 carbon atoms; R.sup.1 represents a straight chain alkyl group having from 2 to 5 carbon atoms; X represents a fluorine atom or a methyl group; n represents 1 or 2; m represents an integer of from 0 to 3; and C* represents an asymmetric carbon atom, and a liquid crystal composition containing the same are disclosed. The compound exhibits large spontaneous polarization and low viscosity and, when added to an achiral base liquid crystal composition, induces a chiral nematic phase in which the helical pitch has small temperature dependence.