Patents by Inventor Mutsuo Katsu

Mutsuo Katsu 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).

  • Flame resistant staple fiber blend
    Patent number: 4988746
    Abstract: A flame resistant staple fiber blend, useful for flame-resistant clothing, comprising 80 to 97 weight parts of m-aramide polymer staple fibers (A) with a small thermal shrinkage stress of 130 mg/d or less at 350.degree. C., 3 to 20 weight parts of p-aramide copolymer staple fibers (B) with a higher flame resistance than that of the m-aramide fiber (A), and optionally, 240 weight parts or less of non-fusible staple fibers (C) with a lower thermal shrinkage stress than that of the staple fiber (A).
    Type: Grant
    Filed: February 23, 1989
    Date of Patent: January 29, 1991
    Assignee: Teijin Limited
    Inventors: Makoto Tanaka, Mutsuo Katsu, Tadashi Seki