Patents by Inventor Kinuyo Shintani, legal representative

Kinuyo Shintani, legal representative 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).

  • Stainless steel member for a fuel cell
    Patent number: 8075991
    Abstract: A stainless steel material for a fuel cell, used for a fuel cell or a cartridge for the fuel cell, having a magnetic permeability of 1.000 to 2.500, and forming a layer having a value of chromium atomic %/iron atomic % of not less than 3.0 in the most surface thereof, and/or the layer of thickness of not less than 12 nm calculated as SiO2 having an oxygen atomic % of not less than 20%. Even when brought into contact with the content solution exhibiting acidity of the fuel cell, the stainless steel material reliably suppresses the elution of metal ions thereof.
    Type: Grant
    Filed: August 9, 2007
    Date of Patent: December 13, 2011
    Assignee: Toyo Seikan Kaisha, Ltd.
    Inventors: Kouki Kinouchi, Wataru Kurokawa, Shouzou Shintani, Kinuyo Shintani, legal representative, Daisuke Imoda, Kenji Yoshihiro, You Yamamori