Patents by Inventor Yukihiro Ban

Yukihiro Ban 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).

  • Patent number: 8658731
    Abstract: An object of the present invention is to provide a resin composition in which a surface resistivity and a volume resistivity actually measured in an antistatic region and an electrostatic diffusion region are equivalent to each other, and a remolded product produced by reutilizing a molded product which can hold the above properties. Specifically, disclosed is a resin composition comprising: 100 parts by weight of (a) a thermoplastic resin; 20 to 80 parts by weight of (b) a nonconductive fibrous inorganic filler having an average fiber diameter of not more than 15 ?m; and 10 to 70 parts by weight of the total of (c1) a graphite and (c2) a graphite in which (c) graphite having an average particle diameter of 1 ?m to 50 ?m wherein each kind thereof has a different particle diameter; and at least one of differences in average particle diameter between two kinds thereof is not less than 5 ?m.
    Type: Grant
    Filed: May 16, 2013
    Date of Patent: February 25, 2014
    Assignee: Asahi Kasei Chemicals Corporation
    Inventors: Yoshikuni Akiyama, Minoru Sakata, Yukihiro Ban
  • Publication number: 20130248774
    Abstract: An object of the present invention is to provide a resin composition in which a surface resistivity and a volume resistivity actually measured in an antistatic region and an electrostatic diffusion region are equivalent to each other, and a remolded product produced by reutilizing a molded product which can hold the above properties. Specifically, disclosed is a resin composition comprising: 100 parts by weight of (a) a thermoplastic resin; 20 to 80 parts by weight of (b) a nonconductive fibrous inorganic filler having an average fiber diameter of not more than 15 ?m; and 10 to 70 parts by weight of the total of (c1) a graphite and (c2) a graphite in which (c) graphite having an average particle diameter of 1 ?m to 50 ?m wherein each kind thereof has a different particle diameter; and at least one of differences in average particle diameter between two kinds thereof is not less than 5 ?m.
    Type: Application
    Filed: May 16, 2013
    Publication date: September 26, 2013
    Applicant: ASAHI KASEI CHEMICALS CORPORATION
    Inventors: Yoshikuni AKIYAMA, Minoru SAKATA, Yukihiro BAN
  • Patent number: 8487035
    Abstract: An object of the present invention is to provide a resin composition in which a surface resistivity and a volume resistivity actually measured in an antistatic region and an electrostatic diffusion region are equivalent to each other, and a remolded product produced by reutilizing a molded product which can hold the above properties. Specifically, disclosed is a resin composition comprising: 100 parts by weight of (a) a thermoplastic resin; 20 to 80 parts by weight of (b) a nonconductive fibrous inorganic filler having an average fiber diameter of not more than 15 ?m; and 10 to 70 parts by weight of the total of (c1) a graphite and (c2) a graphite in which (c) graphite having an average particle diameter of 1 ?m to 50 ?m wherein each kind thereof has a different particle diameter; and at least one of differences in average particle diameter between two kinds thereof is not less than 5 ?m.
    Type: Grant
    Filed: March 22, 2007
    Date of Patent: July 16, 2013
    Assignee: Asahi Kasei Chemicals Corporation
    Inventors: Yoshikuni Akiyama, Minoru Sakata, Yukihiro Ban
  • Patent number: 7932315
    Abstract: A hard disk drive inner part formed of a resin which exhibits well-balanced low outgassing properties, ultrasonic cleaning resistance, low ionic contamination properties, low particulate contamination properties, repeated removability, heat resistance, specific gravity, and water-absorbing properties. The hard disk drive inner part includes a resin composition which includes a polyphenylene ether resin (A).
    Type: Grant
    Filed: January 6, 2006
    Date of Patent: April 26, 2011
    Assignee: Asahi Kasei Chemicals Corporation
    Inventors: Hiroshi Kamo, Yukihiro Ban
  • Publication number: 20090253844
    Abstract: An object of the present invention is to provide a resin composition in which a surface resistivity and a volume resistivity actually measured in an antistatic region and an electrostatic diffusion region are equivalent to each other, and a remolded product produced by reutilizing a molded product which can hold the above properties. Specifically, disclosed is a resin composition comprising: 100 parts by weight of (a) a thermoplastic resin; 20 to 80 parts by weight of (b) a nonconductive fibrous inorganic filler having an average fiber diameter of not more than 15 ?m; and 10 to 70 parts by weight of the total of (c1) a graphite and (c2) a graphite in which (c) graphite having an average particle diameter of 1 ?m to 50 ?m wherein each kind thereof has a different particle diameter; and at least one of differences in average particle diameter between two kinds thereof is not less than 5 ?m.
    Type: Application
    Filed: March 22, 2007
    Publication date: October 8, 2009
    Applicant: ASAHI KASEI CHEMICALS CORPORATION
    Inventors: Yoshikuni Akiyama, Minoru Sakata, Yukihiro Ban
  • Publication number: 20070290391
    Abstract: A hard disk drive inner part formed of a resin which exhibits well-balanced low outgassing properties, ultrasonic cleaning resistance, low ionic contamination properties, low particulate contamination properties, repeated removability, heat resistance, specific gravity, and water-absorbing properties. The hard disk drive inner part includes a resin composition which includes a polyphenylene ether resin (A).
    Type: Application
    Filed: January 6, 2006
    Publication date: December 20, 2007
    Inventors: Hiroshi Kamo, Yukihiro Ban
  • Patent number: 6388049
    Abstract: A low-molecular-weight oxymethylene polymer characterized by having a straight-chain molecular structure, a number-average molecular weight of 1,000 to 8,000 and a molecular weight distribution (Mw/Mn) of 1.0 to 3.0, and containing 0 to 30 mol % of a co-monomer.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: May 14, 2002
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Hiroshi Yokoyama, Yukihiro Ban