Patents by Inventor Yoshiaki Yasukawa

Yoshiaki Yasukawa 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: 5145892
    Abstract: A polypropylene resin composition superior in rigidity, resistance to heat distortion, to secondary deformation, to sink mark forming and warpage deformation is provided which comprises a specified polypropylene-ethylene block copolymer and an organic fiber and an optionally added inorganic fiber, or a specified modified polypropylene-ethylene block copolymer and an organic fiber and an optionally added inorganic filler.
    Type: Grant
    Filed: August 26, 1988
    Date of Patent: September 8, 1992
    Assignee: Chisso Corporation
    Inventors: Yoshiaki Yasukawa, Hiroyoshi Asakuno, Kinya Mori, Kenji Iwai
  • Polypropylene resin composition
    Patent number: 5145891
    Abstract: A polypropylene resin composition superior in rigidity, resistances to heat distortion, to secondary deformation, to sink mark forming and to warpage deformation is provided which comprises a specified propylene-ethylene block copolymer and an organic fiber and an optionally added inorganic filler, or a specified modified propylene-ethylene block copolymer and an organic fiber and an optionary added inorganic filler.
    Type: Grant
    Filed: August 26, 1988
    Date of Patent: September 8, 1992
    Assignee: Chisso Corporation
    Inventors: Yoshiaki Yasukawa, Hiroyoshi Asakuno, Kinya Mori, Kenji Iwai