Patents by Inventor Ichirou Tsuji

Ichirou Tsuji 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).

  • High-strength and high-toughness heat-resisting steel
    Patent number: 5817192
    Abstract: This invention relates to a high-strength and high-toughness heat-resisting steel formed from a heat-resisting steel containing, on a weight percentage basis, 0.08 to 0.25% carbon, up to 0.10% silicon, up to 0.10% manganese, 0.05 to 1.0% nickel, 10.0 to 12.5% chromium, 0.6 to 1.9% molybdenum, 1.0 to 1.95% tungsten, 0.10 to 0.35% vanadium, 0.02 to 0.10% niobium, 0.01 to 0.08% nitrogen, 0.001 to 0.01% boron, and 2.0 to 8.0% cobalt, the balance being substantially iron, and having a structure consisting of a tempered martensite matrix.
    Type: Grant
    Filed: November 21, 1996
    Date of Patent: October 6, 1998
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Hisataka Kawai, Toshio Sakon, Yoshikuni Kadoya, Ichirou Tsuji, Ryotarou Magoshi