Patents by Inventor Narito Ishiga

Narito Ishiga 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).

  • Thermoplastic resin composition
    Patent number: 6610787
    Abstract: The present invention relates to a thermoplastic resin composition comprising a rubber-reinforced thermoplastic resin as component (A) and an ethylene-&agr;-olefin copolymer having a Mooney viscosity (ML1+4, 100° C.) of 40 to 110 as component (B), the amount of component (B) being 1 to 70 parts by weight based on 100 parts by weight of component (A).
    Type: Grant
    Filed: June 13, 2002
    Date of Patent: August 26, 2003
    Assignee: Techno Polymer Co., Ltd.
    Inventors: Shinji Isoda, Narito Ishiga, Hironari Muraki, Yuuji Nakagawa
  • Thermoplastic resin composition
    Publication number: 20030022995
    Abstract: The present invention relates to a thermoplastic resin composition comprising a rubber-reinforced thermoplastic resin as component (A) and an ethylene-&agr;-olefin copolymer having a Mooney viscosity (ML1+4, 100° C.) of 40 to 110 as component (B), the amount of component (B) being 1 to 70 parts by weight based on 100 parts by weight of component (A).
    Type: Application
    Filed: June 13, 2002
    Publication date: January 30, 2003
    Inventors: Shinji Isoda, Narito Ishiga, Hironari Muraki, Yuuji Nakagawa
  • Process for preparing an impact resistant resin
    Patent number: 5298563
    Abstract: A process for preparing an impact resistant resin, which comprises a step of graft copolymerizing a monomer mixture comprising an aromatic vinyl monomer and a monomer copolymerizable therewith, to a butadiene rubber-like polymeric latex in the presence of a redox polymerization initiator; a step of coagulating the resulting graft copolymer latex by mixing an antioxidant thereto and adding an alkaline earth metal salt thereto; and a step of washing the coagulated product by a washing water having the pH adjusted to a level of at most 7.
    Type: Grant
    Filed: June 7, 1993
    Date of Patent: March 29, 1994
    Assignee: Mitsubishi Monsanto Chemical Company
    Inventors: Narito Ishiga, Yoshihiko Takeda
  • Graft copolymer resin composition
    Patent number: 5225494
    Abstract: A graft copolymer resin composition having improved impact resistance, particularly at low temperature, obtained by emulsion-polymerizing an aromatic vinyl monomer and a vinyl cyanide monomer, optionally together with an ethylenically unsaturated monomer copolymerizable therein under specific conditions by the action of a polymerization initiator in the presence of a latex of a conjugated diene polymer under specific conditions.
    Type: Grant
    Filed: March 21, 1990
    Date of Patent: July 6, 1993
    Assignee: Mitsubishi Monsanto Chemical Company
    Inventor: Narito Ishiga