Patents by Inventor Hirotoshi Katsuoka

Hirotoshi Katsuoka 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).

  • Polyamide-imide resins and production thereof
    Patent number: 5157097
    Abstract: Melt moldable polyamide-imide resins are disclosed which have a glass transition temperature ranging from 120.degree. to 300.degree. C. and have molecule ends blocked with an unsubstituted aromatic group or an aromatic group having a substituent not reactive with amines, isocyanates, carboxylic acids and dicarboxylic acid anhydrides.
    Type: Grant
    Filed: August 19, 1991
    Date of Patent: October 20, 1992
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Hiroshi Takayanagi, Hirotoshi Katsuoka, Hiromi Nakano, Masumi Ookita, Akihiro Yamaguchi, Masahiko Asano
  • Aromatic polyamide molded article having storage modulus
    Patent number: 4921933
    Abstract: Aromatic polyamide having good high-temperature resistance and processing ability is obtained by specifying the ratio of storage modulus at the glass transition temperature (Tg).degree.C. to that of (Tg+100).degree.C.
    Type: Grant
    Filed: May 27, 1988
    Date of Patent: May 1, 1990
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Masanori Osawa, Kohei Shizuka, Masahiro Kouno, Akio Matsuyama, Hirotoshi Katsuoka, Kazumi Mizutani