Patents by Inventor Shigeki Takikawa

Shigeki Takikawa 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 polymer film, process for producing same, and utilization thereof
    Patent number: 5578243
    Abstract: A liquid crystalline polymer film useful as a high functional optical element is provided. Said liquid crystalline polymer film is formed on a substrate and having at least a tilt orientation fixed, and said tilt orientation is such that the angle between a director of said liquid crystalline polymer and a flat surface of said substrate is in the range of 5 to 85 degrees in terms of an average value.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: November 26, 1996
    Assignee: Nippon Oil Company, Limited
    Inventors: Hitoshi Mazaki, Takuya Matsumoto, Iwane Shiozaki, Shigeki Takikawa
  • Liquid crystalline polymer film, process for producing same, and utilization thereof
    Patent number: 5460748
    Abstract: A liquid crystalline polymer film useful as a high functional optical element is provided. Said liquid crystalline polymer film is formed on a substrate and having at least a tilt orientation fixed, and said tilt orientation is such that the angle between a director of said liquid crystalline polymer and a flat surface of said substrate is in the range of 5 to 85 degrees in terms of an average value.
    Type: Grant
    Filed: June 2, 1994
    Date of Patent: October 24, 1995
    Assignee: Nippon Oil Company, Limited
    Inventors: Hitoshi Mazaki, Takuya Matsumoto, Iwane Shiozaki, Shigeki Takikawa
  • Liquid crystalline polyesters
    Patent number: 5432249
    Abstract: The present invention provides a novel liquid crystalline polyester comprising structural units represented by the following general formulae A, B, C and D: ##STR1## where X and Y are each independently H, Cl, Br or an alkyl group having 1 to 4 carbon atoms, the molar ratio of A/B is in the range from 49/1 to 20/30 and that of C/D is in the range from 10/40 to 45/5.
    Type: Grant
    Filed: December 21, 1994
    Date of Patent: July 11, 1995
    Assignee: Nippon Oil Company, Limited
    Inventors: Yoshihiro Kumagai, Takuya Matsumoto, Iwane Shiozaki, Shigeki Takikawa