Patents by Inventor Takao Sasame

Takao Sasame 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).

  • Method for making ferrous metal having improved resistances to corrosion at elevated temperatures and to oxidization
    Patent number: 3941569
    Abstract: A method for making ferrous metal having highly improved resistances to corrosion and to oxidization, which comprises hot-dipping a metallic workpiece in a molten aluminum or aluminum alloy bath, primary heat-treatment of the metallic workpiece and secondary heat-treatment of the metallic workpiece. During the primary heat-treatment, an intermetallic compound layer is formed over the surface of the metallic workpiece, which is developed into an alloy layer during the secondary heat-treatment to make the alloy layer firmly secured to the base of the workpiece. The secondary heat-treatment may be omitted depending on the application of the ferrous metal processed by this method.
    Type: Grant
    Filed: June 6, 1974
    Date of Patent: March 2, 1976
    Assignee: Toyo Kogyo Co., Ltd.
    Inventors: Takao Sasame, Toshio Yagi