Patents by Inventor Yuichi Fukeshima

Yuichi Fukeshima 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).

  • Surface-treated steel sheet and method for producing same
    Publication number: 20060182988
    Abstract: The present invention provides a surface treated steel sheet including a steel sheet; a plating layer containing at least one metal selected from the group consisting of zinc and aluminum on a surface of the steel sheet; and a film on the plating layer, the film containing at least one metal selected from the group consisting of Al, Mg, and Zn, a tetravalent vanadium compound, and a phosphoric acid group. This surface treated steel sheet exhibits excellent corrosion resistance and excellent surface appearance without containing hazardous substances, such as hexavalent chromium, in the film.
    Type: Application
    Filed: July 28, 2004
    Publication date: August 17, 2006
    Inventors: Takafumi Yamaji, Akira Matsuzaki, Kazuhisa Okai, Keiji Yoshida, Masaaki Yamashita, Yuichi Fukeshima, Toshiyuki Okuma