Patents by Inventor Tsuneyasu Watanabe

Tsuneyasu Watanabe 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).

  • Surface treatment of a weather-resistant steel
    Patent number: 3954511
    Abstract: Surface treatment of weather-resistant steel by applying a liquid composition comprising 5 to 50% of Fe.sub.3 O.sub.4 + Fe.sub.2 O.sub.3, 0.01 to 5% of phosphoric acid, 0.01 to 10% of at least one selected from the consisting of Pb, Ni, Cu, P, Zn, Cr and their compounds, 3 to 30% of butyral resin, the balance being solvent by spraying or brushing. The surface treatment is effective for preventing the occurence of the initial rust formation of the steel and promoting a stable and dense protective rust against subsequent corrosion of the steel.
    Type: Grant
    Filed: November 7, 1974
    Date of Patent: May 4, 1976
    Assignee: Nippon Steel Corporation
    Inventors: Satoshi Kado, Tsuneyasu Watanabe, Kazuhiro Masuda