Patents by Inventor Kazushi Shirayama

Kazushi Shirayama 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).

  • Publication number: 20060263666
    Abstract: A ferritic stainless steel for use as separators of polymer electrolyte fuel cells (PEFCs) has a composition consisting of by mass, 0.020% or less of C, 0.50% or less of Si, 0.50% or less of MA, 0.020-0.080% of P, 0.005% or less of S, 0.50% or less of Ni, 28-32% of Cr, 0.3-2.5% of MD, 0.80% or less of Cu, 0.03-0.25% of Nb, 0.03-0.25% of Ti, 0.04-0.20% of Al, 0.020% or less of N, optionally 0.2-1.0% of V and the balance being Fe except inevitable impurities with C+N being 0.025% or less and Ni+Cu being 0.80% or less. The stainless steel separator maintains low contact resistance in a state exposed to a wet and acidic environment inside a fuel cell for a long while with less metal dissolution.
    Type: Application
    Filed: July 27, 2006
    Publication date: November 23, 2006
    Applicant: Nisshin Steel Co., Ltd.
    Inventors: Manabu Oku, Kazushi Shirayama, Hiroshi Fujimoto
  • Patent number: 6802430
    Abstract: A fuel tank and a fuel-filler tube, which maintain excellent corrosion-resistance over a long term even in a severely corrosive atmosphere, is made of a ferritic stainless steel sheet good of formability. The steel sheet, which has elongation of 30% or more after fracture by a uniaxial tensile test and minimum Lankford value (value-rmin) of 1.3 or more, is formed to a product shape, and paint is cathodically electrodeposited on a surface of the formed stainless steel sheet. The stainless steel sheet may be one coated with an Al or Zn plating layer. When the fuel tank or fuel-filler tube is fabricated by welding, Zn-rich paint is preferably applied to a welded part in prior to cathodic electrodeposition coating.
    Type: Grant
    Filed: March 26, 2003
    Date of Patent: October 12, 2004
    Assignee: Nisshin Steel Co., Ltd.
    Inventors: Kouki Tomimura, Yasutoshi Hideshima, Naoto Hiramatsu, Toshiro Adachi, Kazushi Shirayama
  • Publication number: 20030183626
    Abstract: A fuel tank and a fuel-filler tube, which maintain excellent corrosion-resistance over a long term even in a severely corrosive atmosphere, is made of a ferritic stainless steel sheet good of formability. The steel sheet, which has elongation of 30% or more after fracture by a uniaxial tensile test and minimum Lankford value (value-rmin) of 1.3 or more, is formed to a product shape, and paint is cathodically electrodeposited on a surface of the formed stainless steel sheet. The stainless steel sheet may be one coated with an Al or Zn plating layer. When the fuel tank or fuel-filler tube is fabricated by welding, Zn-rich paint is preferably applied to a welded part in prior to cathodic electrodeposition coating.
    Type: Application
    Filed: March 26, 2003
    Publication date: October 2, 2003
    Applicant: Nisshin Steel Co., Ltd.
    Inventors: Kouki Tomimura, Yasutoshi Hideshima, Naoto Hiramatsu, Toshiro Adachi, Kazushi Shirayama