Patents by Inventor Sigemi Tanimoto

Sigemi Tanimoto 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).

  • Process for treating molten aluminum to remove hydrogen gas and non-metallic inclusions therefrom
    Patent number: 4556419
    Abstract: Hydrogen gas and non-metallic inclusions are removed from molten aluminum by a process comprising the steps of maintaining an atmosphere containing BF.sub.3 gas in a treating vessel above the surface of molten aluminum placed therein, introducing a treating gas into the molten aluminum, and removing floating non-metallic inclusions and treating gas containing hydrogen gas from the surface of the molten aluminum.
    Type: Grant
    Filed: October 19, 1984
    Date of Patent: December 3, 1985
    Assignee: Showa Aluminum Corporation
    Inventors: Ryotatsu Otsuka, Sigemi Tanimoto, Kazuo Toyoda