Patents by Inventor Seikou Nara

Seikou Nara 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).

  • Process of continuously casting steel using electromagnetic field
    Patent number: 5570736
    Abstract: A process for continuously casting steel slabs employing a molten steel containing an oxygen concentration of 30 ppm or less, preferably, 20 ppm or less, using a straight immersion nozzle to which an inert gas is not injected, and disposing a static magnetic field generator on the back surface of the mold for applying the strong static magnetic field to the molten steel within the mold, thereby restricting the flow of the molten steel. With this process, it is possible to prevent the nozzle blocking, and hence to obtain the steel slabs excellent in the internal and surface qualities.
    Type: Grant
    Filed: May 19, 1993
    Date of Patent: November 5, 1996
    Assignee: Kawasaki Steel Corporation
    Inventors: Seikou Nara, Hisao Yamazaki, Nagayasu Bessho, Seiji Taguchi, Tetsuya Fujii