Patents by Inventor Toshiki Kingetsu

Toshiki Kingetsu 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 low-temperature type fuel cell and production method therefor
    Patent number: 7879508
    Abstract: A stainless steel sheet useful as a separator for a low-temperature fuel cell has the surface state that a lot of fine projections (p) stand close together around many fine pits (d) formed over a whole surface. The surface state is realized by alternating electrolytic etching in a ferric chloride solution. When the stainless steel separator is built in a fuel cell, contact resistance between the separator and a graphite electrode is kept at a lower level even in a corrosive atmosphere. Consequently, the fuel cell can be driven with high power-generating efficiency over a long term even under severely corrosive conditions without generation of massive Joule heat.
    Type: Grant
    Filed: January 14, 2009
    Date of Patent: February 1, 2011
    Assignee: Nisshin Steel Co., Ltd.
    Inventors: Tsutomu Miyano, Takeshi Shimizu, Keiji Izumi, Yoshikazu Morita, Shinichi Kamoshida, Toshiki Kingetsu
  • Separator for low-temperature type fuel cell and production method therefor
    Patent number: 7608119
    Abstract: A stainless steel sheet useful as a separator for a low-temperature fuel cell has the surface state that a lot of fine projections (p) stand close together around many fine pits (d) formed over a whole surface. The surface state is realized by alternating electrolytic etching in a ferric chloride solution. When the stainless steel separator is built in a fuel cell, contact resistance between the separator and a graphite electrode is kept at a lower level even in a corrosive atmosphere. Consequently, the fuel cell can be driven with high power-generating efficiency over a long term even under severely corrosive conditions without generation of massive Joule heat.
    Type: Grant
    Filed: September 7, 2001
    Date of Patent: October 27, 2009
    Assignee: Nisshin Steel Co., Ltd.
    Inventors: Tsutomu Miyano, Takeshi Shimizu, Keiji Izumi, Yoshikazu Morita, Shinichi Kamoshida, Toshiki Kingetsu
  • Separator for Low-Temperature Type Fuel Cell and Production Method Therefor
    Publication number: 20090130535
    Abstract: A stainless steel sheet useful as a separator for a low-temperature fuel cell has the surface state that a lot of fine projections (p) stand close together around many fine pits (d) formed over a whole surface. The surface state is realized by alternating electrolytic etching in a ferric chloride solution. When the stainless steel separator is built in a fuel cell, contact resistance between the separator and a graphite electrode is kept at a lower level even in a corrosive atmosphere. Consequently, the fuel cell can be driven with high power-generating efficiency over a long term even under severely corrosive conditions without generation of massive Joule heat.
    Type: Application
    Filed: January 14, 2009
    Publication date: May 21, 2009
    Applicant: NISSHIN STEEL CO., LTD.
    Inventors: Tsutomu Miyano, Takeshi Shimizu, Keiji Izumi, Yoshikazu Morita, Shinichi Kamoshida, Toshiki Kingetsu
  • Separator for low-temperature type fuel cell and production method therefor
    Publication number: 20030170523
    Abstract: A stainless steel sheet useful as a separator for a low-temperature fuel cell has the surface state that a lot of fine projections (p) stand close together around many fine pits (d) formed over a whole surface. The surface state is realized by alternating electrolytic etching in a ferric chloride solution. When the stainless steel separator is built in a fuel cell, contact resistance between the separator and a graphite electrode is kept at a lower level even in a corrosive atmosphere. Consequently, the fuel cell can be driven with high power-generating efficiency over a long term even under severely corrosive conditions without generation of massive Joule heat.
    Type: Application
    Filed: December 19, 2002
    Publication date: September 11, 2003
    Inventors: Tsutomu Miyano, Takeshi Shimizu, Keiji Izumi, Yoshikazu Morita, Shinichi Kamoshida, Toshiki Kingetsu