Patents by Inventor Hiroko Kudo

Hiroko Kudo 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).

  • Ferroelectric smectic liquid crystal compound and composition containing the same
    Patent number: 5049308
    Abstract: A liquid crystal compound represented by formula: ##STR1## wherein R.sub.1 represents a straight chain alkyl group having from 4 to 18 carbon atoms; R.sub.2 represents a straight chain alkyl group having from 2 to 6 carbon atoms or a branched alkyl group having from 3 to 6 atoms and having a methyl group as a side chain; and m and n each represents 1 or 2, is disclosed.The liquid crystal compound of formula (I) is optically and electrically stable and exhibits fast electro-optical switching in image display.
    Type: Grant
    Filed: June 27, 1989
    Date of Patent: September 17, 1991
    Assignee: Takasago International Corporation
    Inventors: Shigeru Mitsuhashi, Hitoshi Kondo, Tetsuharu Okazaki, Shinji Endoh, Hiroko Kudo, Akio Yamaguchi, Haruki Tsuruta, Susumu Akutagawa
  • Ferroelectric smectic liquid crystal compound and composition containing the same
    Patent number: 4886623
    Abstract: A liquid crystal compound represented by formula: ##STR1## wherein R.sub.1 represents a straight chain alkyl group having from 4 to 18 carbon atoms; R.sub.2 represents a straight chain alkyl group having from 2 to 6 carbon atoms or a branched alkyl group having from 3 to 6 atoms and having a methyl group as a side chain; and m and n each represents 1 or 2, is disclosed.The liquid crystal compound of formula (I) is optically and electrically stable and exhibits fast electro-optical switching in image display.
    Type: Grant
    Filed: December 23, 1987
    Date of Patent: December 12, 1989
    Assignee: Takasago International Corporation
    Inventors: Shigeru Mitsuhashi, Hitoshi Kondo, Tetsuharu Okazaki, Shinji Endoh, Hiroko Kudo, Akio Yamaguchi, Haruki Tsuruta, Susumu Akutagawa