Patents by Inventor Ichiro Kuwamura

Ichiro Kuwamura 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 having naphthalene nucleus
    Patent number: 4973738
    Abstract: Novel ferroelectric liquid crystal compounds which may realize a stable molecular orientation which makes it possible to give a definite light-dark contrast in the no electric field state and attain a definite threshold property as well as hysteresis, and for making it possible to attain the dynamic driving as well as the high speed of response, owing to tri-stable phase thereof, of the general formulae (I) and (II) ##STR1## in which R.sub.1 means an alkyl, alkoxy or alkyloxycarbonyl each of 1-20 carbon atoms, R.sub.
    Type: Grant
    Filed: April 28, 1989
    Date of Patent: November 27, 1990
    Assignee: Showa Shell Sekiyu K.K.
    Inventors: Yoshiichi Suzuki, Ichiro Kuwamura, Takashi Hagiwara