Patents by Inventor Tomohisa Fukao

Tomohisa Fukao 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 and injection molded article
    Patent number: 6656987
    Abstract: A polypropylene resin composition which comprises 100 parts by weight of a propylene homopolymer, 0.01 to 1.0 part by weight of phosphoric acid ester type nucleating agent (a) and 1.5 to 5 parts by weight of talc (b), wherein the composition satisfies the following condition (1): (1) the injection molded article of the polypropylene resin composition has degrees of orientation A and orientation B measured by wide angle X-ray diffraction of not less than 35 and not less than 300, respectively.
    Type: Grant
    Filed: November 21, 2001
    Date of Patent: December 2, 2003
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Isao Takashima, Kenichi Ohkawa, Tomohisa Fukao
  • Polypropylene resin composition and injection molded article
    Publication number: 20020095004
    Abstract: A polypropylene resin composition which comprises 100 parts by weight of a propylene homopolymer, 0.01 to 1.0 part by weight of phosphoric acid ester type nucleating agent (a) and 1.
    Type: Application
    Filed: November 21, 2001
    Publication date: July 18, 2002
    Inventors: Isao Takashima, Kenichi Ohkawa, Tomohisa Fukao
  • Crystalline polypropylene and crystalline polypropylene composition
    Patent number: 5141994
    Abstract: Crystalline polypropylene excellent in rigidity, heat resistance and surface hardness is disclosed, having a ratio of weight average molecular weight (Mw) to number average molecular weight (Mn) (Mw/Mn) of 10 or more, an intrinsic viscosity [.eta.] of from 0.8 to 5.0 dl/g as measured in tetralin at 135.degree. C., a cold xylene-soluble content (CXS) of not more than 4% by weight, a density (d) of 0.910 g/cm.sup.3 or more as measured at 23.degree. C., and a long period (L) (.ANG.) as measured at 25.degree. C. by a small-angle X-ray scattering method satisfying relationship:L.ltoreq.LC=6667d-5894wherein d is a density at 23.degree. C.; and Lc is a value (.ANG.) obrained by equation:Lc=6667d-5894.A crystalline polypropylene composition containing the foregoing crystalline polypropylene, which is excellent in rigidity and heat resistance, is also disclosed.
    Type: Grant
    Filed: November 6, 1989
    Date of Patent: August 25, 1992
    Assignee: Sumitomo Chemical Co., Ltd.
    Inventors: Masahiro Kakugo, Hajime Sadatoshi, Jiro Sakai, Kazuki Wakamatsu, Kazuhiro Chikaishi, Toshiro Kojima, Hideo Nomura, Tomohisa Fukao
  • Resin composition
    Patent number: 4883842
    Abstract: There is disclosed resin composition comprising 1 to 99% by weight of a polymer A and 1 to 99% by weight of a polymer B, the polymer A and B having refractive indexes which permit satisfaction of the relation:a.ltoreq.0.015 and b-a.gtoreq.0.005wherein a and b are the minimum and the maximum, respectively, of absolute value of the difference between the refractive indexes of the polymers A and B in the temperature range of 20.degree. to 100.degree. C.; said composition being useful as a functional resin for buildings, etc.
    Type: Grant
    Filed: March 28, 1988
    Date of Patent: November 28, 1989
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Shigeo Tanaka, Jiro Sakai, Tomohisa Fukao, Kizuku Wakatsuki, Kazuki Wakamatsu