Patents by Inventor Tadaaki Isozaki

Tadaaki Isozaki 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).

  • Liquid crystal compounds
    Patent number: 5310500
    Abstract: Antiferroelectric liquid crystal compounds are provided which have the formula ##STR1## wherein R.sub.1 represents an alkyl group having 5-18 carbon atoms,R.sub.
    Type: Grant
    Filed: June 5, 1992
    Date of Patent: May 10, 1994
    Assignee: Showa Shell Sekiyu Kabushiki Kaisha
    Inventors: Yoshihiko Aihara, Tadaaki Isozaki, Toru Ooide, Noriko Yamakawa
  • Liquid crystal compound
    Patent number: 5207947
    Abstract: Liquid crystal compound of the formula ##STR1## wherein R.sub.1 and R.sub.2 each is a C.sub.1-18 alkyl group or an aralkyl group, R' is a haloalkyl group, X is --0--, --CO--, --COO-- or direct bond, Y is --COO--, --OCO-- or --CH.sub.2 O--, (A) and (B) each is ##STR2## and p and l each is zero or one.
    Type: Grant
    Filed: June 11, 1991
    Date of Patent: May 4, 1993
    Assignee: Showa Shell Sekiyu Kabushiki Kaisha
    Inventors: Yoshiichi Suzuki, Noriko Yamakawa, Yoshihiko Aihara, Hiroyuki Mogamiya, Toru Ooide, Tadaaki Isozaki, Yuvra Negi, Shigenori Sakuma