Patents by Inventor Masasi Nakagiri

Masasi Nakagiri 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).

  • Hydrolyzed ethylene-vinyl acetate copolymer
    Patent number: 4857589
    Abstract: A hydrolyzed ethylene-vinyl acetate copolymer having an ethylene content of 20 to 60% by mole and a defree of hydrolysis in the vinyl acetate component of at least 95% by mole, and having an ash content of not more than 20 ppm and an alkali metal content of not more than 5 ppm. The hydrolyzed copolymer of the invention can form films whose gas impermeability is not lowered even at high humidity.
    Type: Grant
    Filed: July 15, 1987
    Date of Patent: August 15, 1989
    Assignee: Nippon Gohsei Kagaku Kogyo Kabushiki Kaisha
    Inventors: Shinji Okamoto, Masaaki Minakawa, Youiti Neki, Masasi Nakagiri