Patents by Inventor Hidesato Mabuchi

Hidesato Mabuchi 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 steel sheet highly resistant to dynamic deformation and excellent in workability and process for the production thereof
    Patent number: 6544354
    Abstract: The object of the present invention is to provide high-strength steel sheets exhibiting high impact energy absorption properties, as steel sheets to be used for shaping and working into such parts to front side members which absorb impact energy upon collision, as well as a method for their production.
    Type: Grant
    Filed: July 28, 1999
    Date of Patent: April 8, 2003
    Assignee: Nippon Steel Corporation
    Inventors: Osamu Kawano, Junichi Wakita, Yuzo Takahashi, Hidesato Mabuchi, Manabu Takahashi, Akihiro Uenishi, Yukihisa Kuriyama, Riki Okamoto, Yasuharu Sakuma
  • High-strength steel plate having high dynamic deformation resistance and method of manufacturing the same
    Patent number: 6319338
    Abstract: The object of the present invention is to provide high-strength steel sheets exhibiting high impact energy absorption properties, as steel materials, to be used for shaping and working into such parts as front side members of automobiles which absorb impact energy upon collision, as well as a method for their production.
    Type: Grant
    Filed: July 6, 1999
    Date of Patent: November 20, 2001
    Assignee: Nippon Steel Corporation
    Inventors: Osamu Kawano, Yuzo Takahashi, Junichi Wakita, Hidesato Mabuchi, Manabu Takahashi, Akihiro Uenishi, Riki Okamoto, Yukihisa Kuriyama, Yasuharu Sakuma
  • Welded joint of high fatigue strength
    Patent number: 5964964
    Abstract: A propagation speed of a fatigue crack in a HAZ is restricted, and a fatigue strength of an as-welded joint can be improved, by limiting an area ratio of a ferrite micro-structure in the HAZ of the welded joint to 20 to 100% and the balance to one of a bainite, a martensite, a pearlite and a residual austenite micro-structure, or limiting a carbon equivalent of a steel plate used for the welded joint to not greater than 0.275.
    Type: Grant
    Filed: October 3, 1997
    Date of Patent: October 12, 1999
    Assignee: Nippon Steel Corporation
    Inventors: Katsumi Kurebayashi, Syuji Aihara, Hidesato Mabuchi, Naoki Saito
  • Steel for chimney or gas duct, excellent in pitting resistance and rust adhesion
    Patent number: 5820819
    Abstract: The present invention has an object to provide a steel for a chimney or a gas duct, which is excellent in pitting resistance and rust adhesion in a corrosive environment caused by combustion waste gas in a plant in which the combustion of natural gas occurs. Pitting resistance and rust adhesion are remarkably improved in the steel of the present invention which steel is prepared by using a 5% Cr steel as the base, while reducing an impurity sulfur to not more than 0.010 wt. %, adding titanium within a range of 0.005 to 0.05 wt. %, and further adding nickel alone within a range of 1.0 to 2.5 wt. %, or adding molybdenum alone within a range of 0.10 to 1.0 wt. %, or adding in combination therewith trace amount of copper or molybdenum within a range of 0.10 to 1.0 wt. %.
    Type: Grant
    Filed: August 20, 1996
    Date of Patent: October 13, 1998
    Assignees: Nippon Steel Corporation, Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Koji Tanabe, Hidesato Mabuchi, Yukio Tomita, Akira Usami, Katsutoshi Hashima, Hiroshi Kondo, Ryuichiro Ebara, Yoshikazu Yamada, Kazuhide Yamauchi, Masuo Matsumoto