Patents by Inventor Yasutada Katashiba

Yasutada Katashiba 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).

  • Solution for forming thermal resisting polymers
    Patent number: 3997513
    Abstract: A concentrated solution suitable for forming thermal resisting polymers having a high degree of polymerization comprising a mixture of a prepolymer solution prepared by the reaction of an organic diisocyanate or diamine and a molar excess of 1,2,3,4-butanetetracarboxylic acid or an anhydride of the acid, and a blocked polyisocyanate.
    Type: Grant
    Filed: December 6, 1974
    Date of Patent: December 14, 1976
    Assignee: Nitto Electric Industrial Co., Ltd.
    Inventors: Yuzuru Noda, Makoto Kojima, Shiro Mazaki, Yasutada Katashiba