Patents by Inventor Kenji Hirashima

Kenji Hirashima 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).

  • Ultrathin stainless steel foil
    Patent number: 6187452
    Abstract: An ultrathin stainless steel foil of a thickness of 25 &mgr;m or less whose average number of inclusions of a major diameter of 5 &mgr;m or greater per 1 mm2 in sections along the rolling direction is 3 or less. The ultrathin stainless steel foil is not readily susceptible to the local tunnel-like corrosions (voids) that have occasionally occurred, during etching, together with cracking in the rolling direction from the edges.
    Type: Grant
    Filed: March 20, 2000
    Date of Patent: February 13, 2001
    Assignee: Nippon Steel Corporation
    Inventors: Izumi Muto, Michio Nakata, Yoshihiro Fujii, Kenji Hirashima, Shuji Nagasaki, Jun Nakatsuka, Tsuyoshi Nakano
  • Heat-resistant stainless steel foil for catalyst-carrier of combustion exhaust gas purifiers
    Patent number: 5045404
    Abstract: A heat-resistant stainless steel foil for a catalyst-carrier of combustion exhaust gas purifiers, consisting essentially in weight percentage of:more than 0.06 up to 0.15 of Ln, the Ln being a mixture of La, Ce, Pr and Nd;from 8x(%Ln+0.015) /45 to 0.1 of P;from 4.5 to 6.5 of Al;from 13 to 25 of Cr;not more than 0.025 of C;not more than 0.02 of N;not more than 0.03 of C+N; andthe balance consisting of Fe and unavoidable impurities.
    Type: Grant
    Filed: September 26, 1990
    Date of Patent: September 3, 1991
    Assignees: Nippon Steel Corporation, Toyota Jidosha Kabushiki Kaisha, Nippon Kinzoku Co., Ltd.
    Inventors: Keiichi Ohmura, Miko Yamanaka, Fumio Fudanoki, Masayuki Tendoh, Kenji Hirashima, Masaaki Kobayashi, Shinji Shibata, Tomoyuki Sugino, Toshihiro Takada, Yoshio Nishizawa, Akihiko Kasahara