Patents by Inventor Takuya Segawa

Takuya Segawa 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).

  • Separator for metal halogen cell
    Patent number: 7081321
    Abstract: A separator for metal/halogen batteries is provided which is excellent in thermal resistance, resistance to stress-cracking and electric properties. A separator for metal/halogen batteries comprising a polyolefin having a viscosity average molecular weight of not less than 350,000 and not more than 2,000,000, in which polyolefin the proportion by weight of a polyolefin having a molecular weight of not less than 1,000,000 is not less than 15% and not more than 80%, and a hydrophilic fine particulate inorganic material(s), wherein the weight ratio of the polyolefins to the hydrophilic fine particulate inorganic material(s) is not less than 0.55 and less than 1, said separator having a pore volume of not less than 900 mm3/g and a thickness of 0.2 to 1.0 mm.
    Type: Grant
    Filed: May 29, 2001
    Date of Patent: July 25, 2006
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Yoshifumi Nishimura, Takuya Segawa
  • Separator for metal halogen cell
    Publication number: 20030108796
    Abstract: A separator for metal/halogen batteries is provided which is excellent in thermal resistance, resistance to stress-cracking and electric properties. A separator for metal/halogen batteries comprising a polyolefin having a viscosity average molecular weight of not less than 350,000 and not more than 2,000,000, in which polyolefin the proportion by weight of a polyolefin having a molecular weight of not less than 1,000,000 is not less than 15% and not more than 80%, and a hydrophilic fine particulate inorganic material(s), wherein the weight ratio of the polyolefins to the hydrophilic fine particulate inorganic material(s) is not less than 0.55 and less than 1, said separator having a pore volume of not less than 900 mm3/g and a thickness of 0.2 to 1.0 mm.
    Type: Application
    Filed: November 13, 2002
    Publication date: June 12, 2003
    Inventors: Yoshifumi Nishimura, Takuya Segawa