Patents by Inventor Mashachika Yaguchi

Mashachika Yaguchi 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).

  • Nematic liquid crystal compositions
    Patent number: 4048088
    Abstract: When azo type and/or azoxy type compounds having specific structures are incorporated into a nematic liquid crystal material, a liquid crystal composition having positive dielectric anisotropy and a broad mesomorphic range extending above and below room temperature can be obtained. An electro-optical device in which a thin layer of this liquid crystal composition is filled and supported between two substrates can be used for light modulation and display.
    Type: Grant
    Filed: April 23, 1976
    Date of Patent: September 13, 1977
    Assignee: Dai Nippon Toryo Kabushiki Kaisha
    Inventors: Mashachika Yaguchi, Kenji Nakamura
  • Nematic liquid crystal compositions
    Patent number: 3989639
    Abstract: When azo type and/or azoxy type compounds having specific structures are incorporated into a nematic liquid crystal material, a liquid crystal composition having positive dielectric anisotropy and a broad mesomorphic range extending above and below room temperature can be obtained. An electro-optical device in which a thin layer of this liquid crystal composition is filled and supported between two substrates can be used for light modulation and display.
    Type: Grant
    Filed: August 30, 1974
    Date of Patent: November 2, 1976
    Assignee: Dai Nippon Toryo Kabushiki Kaisha
    Inventors: Mashachika Yaguchi, Kenji Nakamura
  • Nematic liquid crystal compositions
    Patent number: 3977768
    Abstract: By incorporating at least one of p-n-alkylcyanobenzene, p-cyanobenzylideneaniline and p-cyanophenyl p'-n-octyloxybenzoate into a Schiff base type nematic liquid crystal composition having negative dielectric anisotropy, a nematic liquid crystal composition having positive dielectric anisotropy is obtained. The nematic liquid crystal composition of the latter exhibits a liquid crystal state in a broad temperature range including room temperature and is useful for a torsion effect type electrooptical display device which can operate at low voltages.
    Type: Grant
    Filed: November 25, 1974
    Date of Patent: August 31, 1976
    Assignee: Dai Nippon Toryo Kaubshiki Kaisha
    Inventors: Kenji Nakamura, Mashachika Yaguchi, Toshio Jinnai, Kazuo Totani, Shigetaro Furuta, Masayoshi Nichogi
  • Electro-optical device employing nematic liquid crystal
    Patent number: 3955881
    Abstract: In an electro-optical element comprising a pair of electrode plates and a layer of nematic liquid crystal material having a positive dielectric anisotropy positioned between the two plates, at least one of the electrode plates is coated on its inner face with organic high molecular materials. Molecular axes of the liquid crystal are oriented uniformly on the electrode face by rubbing the coated electrode along one direction.
    Type: Grant
    Filed: July 1, 1974
    Date of Patent: May 11, 1976
    Assignee: Dai Nippon Toryo Kabushiki Kaisha
    Inventors: Mashachika Yaguchi, Toshio Jinnai, Mikio Shirotsuka, Kazuo Totani