Patents by Inventor Takeiji Ohtani

Takeiji Ohtani 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).

  • Acrylonitrile block-copolymer composition
    Patent number: 4181581
    Abstract: An acrylonitrile polymer composition comprising an admixture of(I) 30 to 80 weight % of an acrylonitrile polymer containing at least 40 weight % acrylonitrile;(II) 10 to 80 weight % of a chlorine containing polymer having a chlorine content of at least 20 weight %; and(III) 0.5 to 10 weight % of an A-B block copolymer in which B is acrylonitrile and A is a monomer copolymerizable with monomer B.
    Type: Grant
    Filed: November 29, 1978
    Date of Patent: January 1, 1980
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Hiroshi Iwata, Takeiji Ohtani, Seiichi Arakawa, Seiji Deguchi