Patents by Inventor Kikumasa Sato

Kikumasa Sato has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Trans-dihalogenostilbene compounds and liquid crystal electro-optical devices using them
    Patent number: 5380461
    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.
    Type: Grant
    Filed: September 30, 1991
    Date of Patent: January 10, 1995
    Assignee: Seimi Chemical Co., Ltd.
    Inventors: Kikumasa Sato, Seiichi Inoue, Jun Ishihara, Katsutoshi Machida