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:
Jan. 10, 1995
Filed:
Sep. 30, 1991
Kikumasa Sato, Yokohama, JP;
Seiichi Inoue, Yokohama, JP;
Jun Ishihara, Tokyo, JP;
Katsutoshi Machida, Kanagawa, JP;
Seimi Chemical Co., Ltd., Chigasaki, JP;
Abstract
A trans-dihalogenostilbene compound of the formula: ##STR1## wherein each of A.sup.1 to A.sup.4, which are independent from one another, is a trans-1,4-cyclohexylene group or a 1,4-phenylene group, which is unsubstituted or substituted by one or more halogen atoms, methyl groups or nitrile groups and in which one or more CH groups may be substituted by nitrogen atoms, and one or more CH.sub.2 groups may be substituted by oxygen atoms or sulfur atoms; each of B.sup.1 and B.sup.2, which are independent from each other, is a 1,4-phenylene group, which is unsubstituted or substituted by one or more halogen atoms, methyl groups or nitrile groups and in which one or more CH groups may be substituted by nitrogen atoms; each of Y.sup.1 to Y.sup.4, which are independent from one another, is --COO--, --O--, --OCO--, --CH.sub.2 CH.sub.2 --, --CH.sub.2 --, --CH.dbd.CH--, --OCH.sub.2 --, --CH.sub.2 O--, --CH.dbd.N--, --NO.dbd.N--, --N.dbd.ON--, --C.tbd.C--, --N.dbd.N-- or a single bond; each of X.sup. 1 and X.sup.2, which are independent from each other, is a fluorine atom, a chlorine atom, a bromine atom or a trifluoromethyl group; each of m, n, p and q is 0 or 1; and each of R.sup.1 and R.sup.2, which are independent from each other, is a C.sub.1 -C.sub.10 alkyl group, a halogen atom, a nitrile group or an isothiacyanate group, provided that in the case of the alkyl group, an oxygen atom may be interposed in a carbon-carbon bond of the group or in a carbon-carbon bond between this group and the adjacent ring, and in a case where R.sup.1 or R.sup.2 is the alkyl group, some of hydrogen atoms in the group may be substituted by fluorine atoms.