Patents by Inventor Norihisa Tamashima

Norihisa Tamashima 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).

  • Polypropylene resin composition
    Patent number: 5283267
    Abstract: The polypropylene resin composition of the present invention comprises specific proportions of a crystalline ethylene-propylene block copolymer, an hydrogenated block copolymer, an amorphous ethylene-propylene copolymer, surface-treated talc, fibrous magnesium oxysulfate of granular form and a metal soap. This resin composition is well balanced in rigidity and impact resistance, has good mar resistance, and can be preferably used in large-sized parts for automobiles, particularly instrument panels for automobiles.
    Type: Grant
    Filed: December 21, 1990
    Date of Patent: February 1, 1994
    Assignee: Ube Industries, Ltd.
    Inventors: Takeyoshi Nishio, Norihisa Tamashima, Kouhei Ueno, Tomohiko Akagawa, Saburo Hinenoya, Shinji Katsui
  • Polypropylene resin composition
    Patent number: 5039525
    Abstract: A polypropylene resin composition obtained by mixing a crystalline ethylene-propylene block copolymer, an amorphous ethylene-propylene copolymer, talc and fibrous magnesium oxysulfate and then, at the time of melt-kneading the mixture, adding a metal soap to the mixture, retains the fiber length of the fibrous magnesium oxysulfate and has high rigidity with the addition of a small amount of the metal soap.
    Type: Grant
    Filed: November 30, 1990
    Date of Patent: August 13, 1991
    Assignee: Toyota Jidosha Kabushiki Kaisha & Ube Industries, Ltd.
    Inventors: Norihisa Tamashima, Kouhei Ueno, Tomohiko Akagawa, Saburo Hinenoya, Shinji Katsui