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. 11, 2000
Filed:
Feb. 02, 1999
Noriyuki Onishi, Kumamoto, JP;
Koichi Shibata, Chiba, JP;
Yasuhiro Haseba, Chiba, JP;
Yasuyuki Koizumi, Chiba, JP;
Shuichi Matsui, Chiba, JP;
Kazutoshi Miyazawa, Chiba, JP;
Yasuko Sekiguchi, Chiba, JP;
Etsuo Nakagawa, Chiba, JP;
Chisso Corporation, Osaka, JP;
Abstract
The present invention is to provide a liquid crystalline The present invention is concerned with a liquid crystalline compound expressed by general formula (1) ##STR1## wherein R.sub.1 represents cyano group, halogen atom, or a straight or branched alkyl group or halogenated alkyl group having 1 to 20 carbon atoms, one or not-adjacent two CH.sub.2 groups in the alkyl group or halogenated alkyl group may be replaced by oxygen atom or --CH.dbd.CH-- group; R.sub.2 and R.sub.2 ' represent hydrogen atom, halogen atom, or an alkyl group having 1 to 9 carbon atoms; X.sub.1, X.sub.2, and X.sub.3 independently represent --CH.sub.2 CH.sub.2 --, --CO--O--, --O--CO--, --CH.dbd.CH--, --C.tbd.C--, --(CH.sub.2).sub.4 --, --CF.sub.2 O--, --OCF.sub.2 --, --CH.sub.2 O--, --OCH.sub.2 --, or a covalent bond; rings A, B, C, and D independently represent 1,4-phenylene ring, trans-1,4-cyclohexylene ring, bicyclo[1,1,0]butane ring, bicyclo[1,1,1]pentane ring, bicyclo[3,2,2]octane ring, cyclobutane ring, or spiro[3,3]heptane ring, respectively, hydrogen atom in these rings may be replaced by halogen atom and carbon atom in these rings may be replaced by nitrogen atom or oxygen atom; l, m, and o are independently 0 or 1, n is an integer of 0 to 3, and p is an integer of 1 to 5.