Patents by Inventor Shintaro Kumazawa

Shintaro Kumazawa 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).

  • Ferrite stainless steel sheet having less planar anisotropy and excellent anti-ridging characteristics and process for producing same
    Patent number: 5851316
    Abstract: A ferritic stainless steel sheet having less planar anisotropy and excellent anti-ridging characteristics is disclosed. The sheet includes not more than about 0.02 wt % of C, about 0.01-1.0 wt % of Si, about 0.01-1.0 wt % of Mn, not more than about 0.08 wt % of P, not more than about 0.01 wt % of S, about 0.005-0.30 wt % of Al, about 11-50 wt % of Cr, about 0.1-5.0 wt % of Mo, not more than about 0.03 wt % N, with the contents of C and N satisfying the relations: about 0.005 wt %.ltoreq.(C+N)<about 0.03 wt %, and (C/N)<about 0.6. The sheet also includes Ti in an amount to satisfy the relation: about 5.ltoreq.Ti/(C+N).ltoreq.about 30. The balance of the sheet includes Fe and incidental impurities, with the sheet having an X-ray integral intensity ratio (222)/(310) of not less than about 35 in a plane parallel to a sheet surface at a depth of 1/4 of the sheet thickness from the sheet surface.
    Type: Grant
    Filed: September 24, 1996
    Date of Patent: December 22, 1998
    Assignee: Kawasaki Steel Corporation
    Inventors: Yoshihiro Yazawa, Takumi Ujiro, Susumu Satoh, Shintaro Kumazawa, Makoto Kobayashi, Masayuki Kasai