Patents by Inventor Hirofumi Makiura

Hirofumi Makiura 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).

  • Ferritic stainless steel having improved weldability and oxidation resistance
    Patent number: 4140526
    Abstract: A ferritic stainless steel having improved weldability and oxidation resistance, consisting essentially of 11.0 - 20.0% by weight of Cr, less than 0.10% by weight of C, less than 1.5% by weight of Si, less than 1.5% by weight of Mn, less than 1.5% by weight of Zr, the ratio of (Zr%)/(C% + N%) being higher than 7, and the balance of Fe, and the nitrogen amount being restricted to less than 0.015% by weight.
    Type: Grant
    Filed: November 7, 1977
    Date of Patent: February 20, 1979
    Assignees: Sumitomo Metal Industries, Ltd., Nippon Stainless Steel Co., Ltd.
    Inventors: Taishi Moroishi, Isamu Koizumi, Hisao Fujikawa, Hirofumi Makiura, Yuji Shoji