Patents by Inventor Shigekazu Ohi

Shigekazu Ohi 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).

  • Process for preparing thermoplastic resin composition
    Patent number: 5310776
    Abstract: There is disclosed a process for preparing a thermoplastic resin composition which comprises melting and kneading(A) 100 parts by weight of a resin comprising 100% by weight in total of:(a) 5 to 95% by weight of a non-crystalline thermoplastic resin,(b) 95 to 5% by weight of a crystalline thermoplastic resin,(c) 0 to 50% by weight of a compatibilizer and(d) 0 to 40% by weight of an impact modifierand(B) 1.0 part by weight or more of an organic solvent in a kneader equipped with vent ports each having a vacuum device while maintaining each vent port at reduced pressure to make an organic solvent content in a final composition less than 1.0% by weight.
    Type: Grant
    Filed: April 30, 1993
    Date of Patent: May 10, 1994
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Kiyoji Takagi, Yoshihiro Kurasawa, Koji Nishida, Shigekazu Ohi, Kenji Mori, Tsukasa Sato, Tosio Itou
  • Polyphenylene ether compositions
    Patent number: 4782108
    Abstract: Polyphenylene ether compositions comprising a polyphenylene ether, an alkenylaromatic polymer, a rubber substance, a polyethylene or ethylenic copolymer, and a mineral oil. These polyphenylene compositions are excellent in the balance among fluidity, impact resistance and gloss.
    Type: Grant
    Filed: August 3, 1987
    Date of Patent: November 1, 1988
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Kazunori Yano, Shigekazu Ohi, Yoshinobu Kobayashi, Katsuhiro Abe
  • Self-extinguishing resin composition
    Patent number: 4067847
    Abstract: A self-extinguishing resin composition comprises 55 - 25 wt. % of a thermoplastic resin and 45 - 75 wt. % of magnesium hydroxide, wherein said magnesium hydroxide has a specific surface area of less than or equal to 45 m.sup.2 /g. Such a composition is not subject to formation of a silver-colored streak upon being extrusion- or injection-molded.
    Type: Grant
    Filed: October 17, 1975
    Date of Patent: January 10, 1978
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Hiroshi Yui, Saburo Moriwaki, Yukihiro Ichikawa, Shigekazu Ohi