Patents by Inventor Yuki HAMA

Yuki HAMA 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).

  • Fuel cell separator and method for producing the same
    Patent number: 10305118
    Abstract: First, a passive film is removed from a surface of a separator sheet. For example, the separator sheet may be immersed in an acidic liquid to remove the passive film. Then, the separator sheet is washed with water, taken out from the water, and heated. After the heating, the separator sheet is subjected to an electrolytic treatment to obtain a separator for a fuel cell. The resultant separator has a seal forming portion, and the outermost surface of the seal forming portion contains, based on 100% by weight of the total of a Cr oxide, an Mo oxide, an Fe oxide, Fe, and Ni, 5% by weight or less of the sum of the Fe and Ni and 60% by weight or more of the Cr oxide.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: May 28, 2019
    Assignee: Honda Motor Co., Ltd.
    Inventors: Satoru Terada, Yuki Hama, Masahiro Matsutani, Akihito Giga, Takehiro Mugishima, Mayu Kurata
  • FUEL CELL SEPARATOR AND METHOD FOR PRODUCING THE SAME
    Publication number: 20140295321
    Abstract: First, a passive film is removed from a surface of a separator sheet. For example, the separator sheet may be immersed in an acidic liquid to remove the passive film. Then, the separator sheet is washed with water, taken out from the water, and heated. After the heating, the separator sheet is subjected to an electrolytic treatment to obtain a separator for a fuel cell. The resultant separator has a seal forming portion, and the outermost surface of the seal forming portion contains, based on 100% by weight of the total of a Cr oxide, an Mo oxide, an Fe oxide, Fe, and Ni, 5% by weight or less of the sum of the Fe and Ni and 60% by weight or more of the Cr oxide.
    Type: Application
    Filed: March 25, 2014
    Publication date: October 2, 2014
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Satoru TERADA, Yuki HAMA, Masahiro MATSUTANI, Akihito GIGA, Takehiro MUGISHIMA, Mayu KURATA