Patents by Inventor Kenji Furukawa

Kenji Furukawa 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-crystalline 4-alkylcyclohexyl esters
    Patent number: 4341653
    Abstract: Novel liquid crystal compounds having broader and preferable liquid crystal temperature ranges are provided. Their optically active isomers form a cholesteric liquid crystal, while their racemates form a nematic liquid crystal.The compounds are trans-4"-alkylcyclohexyl esters of 4'-(2-methyl-butyl)-4-biphenylcarboxylic acid expressed by the general formula ##STR1## wherein R represents a straight chain alkyl group having 1 to 10 carbon atoms, and the symbol * represents an asymmetric carbon atom.
    Type: Grant
    Filed: February 26, 1981
    Date of Patent: July 27, 1982
    Assignee: Chisso Corporation
    Inventors: Takashi Inukai, Kenji Furukawa, Shigeru Sugimori, Hideo Sato
  • Liquid crystal 2,3-dicyano-hydroquinone derivatives
    Patent number: 4279770
    Abstract: Liquid crystal materials for liquid crystal display, having a large negative dielectric anisotropy and maintaining a liquid crystal state at a broad temperature range including room temperature are provided. These materials contain novel compounds expressed by the general formula (I) ##STR1## wherein X represents ##STR2## Y represents ##STR3## R.sup.1 and R.sup.3 each represent an alkyl group or an alkyloxy group of 1-10 carbon atoms;R.sup.2 and R.sup.4 each represent an alkyl group of 1-10 carbon atoms; butcompounds wherein ##STR4## are excluded.
    Type: Grant
    Filed: September 12, 1979
    Date of Patent: July 21, 1981
    Assignee: Chisso Corporation
    Inventors: Takashi Inukai, Hiromichi Inoue, Kenji Furukawa, Hideo Sato, Shigeru Sugimori