Patents by Inventor Shiyuzi Yahiro

Shiyuzi Yahiro 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).

  • Thermoplastic graft copolymer and process for producing the same
    Patent number: 5206325
    Abstract: A thermoplastic resin is formed by imparting thermoplasticity to monosaccharide and/or polysaccharide units to form engineering resin that has excellent mechanical property attributes and excellent biodegradability. A thermoplastic graft copolymer is formed by graft-polymerizing graft to backbone. The copolymer comprises backbone which constitutes the monosaccharide and/or polysaccharide units each having a functional group selected from the group consisting of the hydroxyl group, carboxyl group, amino group and amido group, and graft constituting the polyacetal units consisting of repetitive oxymethylene units --CH.sub.2 O-- that are reaction-bonded with each other through the functional group, the polyacetal units being graft-polymerized to the monosaccharide and/or polysaccharide units. The copolymer has viscosity of 0.1-10 (dl/g) and a melting point of 150.degree.-175.degree. C.
    Type: Grant
    Filed: October 25, 1991
    Date of Patent: April 27, 1993
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Tadashige Hata, Kazuhiko Matsuzaki, Shiyuzi Yahiro