Patents by Inventor Takemi Nakamura

Takemi Nakamura 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).

  • Pitch-based high-modulus carbon fibers and method of producing same
    Patent number: 5292408
    Abstract: The present invention provides an improvement in the process of producing pitch-based carbon fibers comprising the steps of spinning a spinnable pitch, treating the resulting pitch fibers for rendering infusible, and carbonizing the same, the improvement comprises the step of removing the surface layer from the carbon fibers obtained in said process.
    Type: Grant
    Filed: July 25, 1991
    Date of Patent: March 8, 1994
    Assignees: Osaka Gas Company Limited, Dainippon Ink and Chemicals, Incorporated
    Inventors: Eiji Tanigawa, Takemi Nakamura, Takayuki Mine