Patents by Inventor Shigehiro Koga

Shigehiro Koga 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).

  • Vinyl chloride resin composition and molded products using same
    Patent number: 4632948
    Abstract: A vinyl chloride resin composition made lightweight and delustered and having a superior abrasion resistance and a good microballoon-retainability, and molded products such as steering wheel using the same are provided, which composition comprises 100 parts by weight (hereinafter "by weight" omitted) of a vinyl chloride copolymer consisting of 97.0.about.99.95% of vinyl chloride and 3.0 to 0.05% of a polyethylene glycol di(meth)acrylate having a specified number of ethylene glycol polymerization units and a specified average polymerization degree, 5 to 100 parts of microballoons having a specified s.g., particle diameter and compressive strength, 1 to 20 parts of polyvinyl acetate having a specified average polymerization degree and 30 to 150 parts of a plasticizer.
    Type: Grant
    Filed: November 30, 1984
    Date of Patent: December 30, 1986
    Assignees: Chisso Corporation, Nihon Plast Co., Ltd.
    Inventors: Tetsuya Yamada, Shigehiro Koga, Kazuyoshi Imai, Kazuo Inaba