Patents by Inventor Yoko Kosaka

Yoko Kosaka 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).

  • Optically inactive, mesomorphic compound, liquid crystal composition containing the compound, liquid crystal device using the composition, liquid crystal apparatus and display method
    Patent number: 5593616
    Abstract: An optically inactive mesomorphic compound represented by the following formula (I): ##STR1## wherein R denotes a linear or branched alkyl group having 1-18 carbon atoms or a linear or branched alkoxy group having 1-18 carbon atoms; and m is an integer of 2-18, is suitable as a component for a liquid crystal composition providing improved response characteristics and a high contrast. A liquid crystal device is constituted by disposing the liquid crystal composition between a pair of substrates. The liquid crystal device may preferably be used as a display panel constituting a liquid crystal apparatus providing good display characteristics.
    Type: Grant
    Filed: September 19, 1994
    Date of Patent: January 14, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shinichi Nakamura, Takao Takiguchi, Takashi Iwaki, Takeshi Togano, Yoko Kosaka
  • Mesomorphic compound, liquid crystal composition containing the compound, liquid crystal device using the composition, liquid crystal apparatus and display method
    Patent number: 5462694
    Abstract: A mesomorphic compound of the formula (I) according to claim 1 characterized by having at least one cyclic group selected from .beta. class including, e.g., thiazole-2,5-diyl, benzoxazole-2,5-diyl, indan-2,5-diyl, and quinoxaline-2,6-diyl and also having a linkage of Y.sup.1 (CH.sub.2).sub.m Y.sup.2, where Y.sup.1 and Y.sup.2 are --CH.sub.2 --, --O--, --COO-- or --OCO-- and m is 1-16, is suitable as a component for a liquid crystal composition providing improved response characteristics. A liquid crystal device is constituted by disposing the liquid crystal composition between a pair of substrates. The liquid crystal device is used as a display panel constituting a liquid crystal apparatus providing good display characteristics.
    Type: Grant
    Filed: August 30, 1994
    Date of Patent: October 31, 1995
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoko Kosaka, Takao Takiguchi, Takashi Iwaki, Takeshi Togano, Shinichi Nakamura, Ikuo Nakazawa