Patents by Inventor Yu Shida

Yu Shida 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).

  • Polyvinyl chloride resin composition for powder molding
    Patent number: 4861816
    Abstract: A polyvinyl chloride resin composition for powder molding which is excellent in resistance to mold staining and in amine resistance, the improvement wherein the polyvinyl chloride composition contains blended therein 0.1-10 parts by weight of a stabilizer mixture of barium salt of the carboxylic acid and zinc salt of a carboxylic acid, each having a melting point not lower than 250.degree. C., the barium and zinc metallic weight ratio being 1:5 to 5:1, and 0.1-10 parts by weight of a metal perchlorate and/or perchlorate ion type hydrotalcite compound per 100 parts by weight of a polyvinyl chloride resin.
    Type: Grant
    Filed: December 9, 1987
    Date of Patent: August 29, 1989
    Assignee: Sumitomo Chemical Company
    Inventors: Masanori Kobayashi, Isao Matsuura, Akira Wakatsuki, Yu Shida