Patents by Inventor Masaro Kidoh

Masaro Kidoh 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).

  • Polyimide film and its manufacturing method
    Patent number: 4808468
    Abstract: The present invention provides a polyimide film whose residual content of volatiles is reduced to not more than 0.45 weight % on the basis of the film, and further a polyimide film whose residual content of volatiles is reduced to not more than 0.45 weight % on the basis of the film and whose oxygen/carbon ratio in the surface layer is increased by 0.01-0.1, and manufacturing methods therefor.According to the present invention, it is possible to provide a polyimide film improved in adhesion performance in a stable and homogeneous manner, and this improvement of adhesion performance is attainable in the film-forming process, not in a separate process of after-treatment.
    Type: Grant
    Filed: August 21, 1987
    Date of Patent: February 28, 1989
    Assignee: Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Hitoshi Nojiri, Katuhiro Kitai, Yoshihide Ohnari, Masaro Kidoh, Tsuneo Yamamoto