Patents by Inventor Shigeo Anzai

Shigeo Anzai 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).

  • Method for blowing gas from below into molten steel in refining vessel
    Patent number: 4266970
    Abstract: A method for blowing a gas from below into a molten steel in a refining vessel, which comprises: using a refining vessel including at least one gas blowing aperture provided in the bottom wall thereof and a frustoconical plug matching with said aperture, releasably inserted into said gas blowing aperture, which has a small-diameter bore having a diameter within the range of from 0.5 to 6.
    Type: Grant
    Filed: December 13, 1979
    Date of Patent: May 12, 1981
    Assignees: Kawasaki Steel Corporation, Tokyo Yogyo Kabushiki Kaisha
    Inventors: Shoji Iwaoka, Hiroyuki Kaito, Shigeo Anzai, Susumu Ushigome, Yoshiaki Watanabe, Nobuyuki Mimura