Patents by Inventor Kazunari Yamato

Kazunari Yamato 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).

  • Structural steel plate highly resistant to nitrate stress corrosion cracking
    Patent number: 4222772
    Abstract: Steel plates having excellent resistance to nitrate stress corrosion cracking often encountered in hot stoves, and high temperature heating furnaces, etc., and comprising:C: 0.005-0.11%;Si: 0.1-1.0%;Mn: 0.1-2.0%;P: not more than 0.025%;S: not more than 0.025%;Cr: 2-6%;Nb: 0.01%-7(C+N)%;Al: 0.01-0.20%;(C+N): not more than 0.06%;and optionally Mo: 0.1 to 1.5%, with the balance being essentially Fe and unavoidable impurities.
    Type: Grant
    Filed: February 23, 1979
    Date of Patent: September 16, 1980
    Assignee: Nippon Steel Corporation
    Inventors: Yasuo Sogo, Hiroki Masumoto, Kazunari Yamato, Yasuhiko Miyoshi, Tomomi Murata, Eiji Sato
  • Welded steel products having low sensitivity to weld cracking and a production method thereof
    Patent number: 4091147
    Abstract: A welded steel product having a low sensitivity to weld cracking, produced by welding a base steel material comprising at least one member selected from the group consisting of rare earth metal, Ca, Ba, Te and Se using a welding material comprising at least one member selected from the group consisting of rare earth metals, Te and Se, and having a weld metal containing at least one rare earth metal in an amount of 0.0005 to 0.10% and at least one of Te and Se in an amount not more than 0.10%.
    Type: Grant
    Filed: November 4, 1976
    Date of Patent: May 23, 1978
    Assignee: Nippon Steel Corporation
    Inventors: Shogo Kanazawa, Akira Nakashima, Kazunari Yamato, Naoyuki Seriu, Tohru Watanabe, Susumu Nakazawa