Patents by Inventor Mitsumasa Nagahisa

Mitsumasa Nagahisa 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).

  • Hot-dip galvanized steel sheet with zero-spangle having excellent age-flaking resistance, and hot-dip galvanizing process and composition of molten zinc bath therefor
    Patent number: 4383006
    Abstract: Hot-dip galvanized steel sheet, wherein said coating layer is characterized by being highly resistant to flaking either in a high-temperature humid atmosphere or in long-term indoor aging. The coating comprises 0.1 to less than 0.2 wt % Al, 0.1-0.5 wt % Sb, the remainder being Zn and unavoidable impurities, the total of the unavoidable impurities other than Fe, namely Pb, Cd and Sn being less than 0.02 wt %, the ratio of Sb/Pb being 10-250, and the Al present in the coating layer being in the form of an Al-Sb eutectic.
    Type: Grant
    Filed: July 8, 1981
    Date of Patent: May 10, 1983
    Assignee: Nippon Steel Corporation
    Inventors: Yoshio Shindo, Teppei Tamura, Motoo Kabeya, Mitsumasa Nagahisa, Hidejirou Asano