Patents by Inventor Masato Ohsawa

Masato Ohsawa 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 preparation of graphite-containing aluminum alloys
    Patent number: 4383970
    Abstract: A process for preparation of graphite-containing aluminum alloys includes incorporating graphite particles into an aluminum containing melt. When the graphite particles are incorporated, floating of the graphite particles to the surface of the melt is prevented by the use of certain additive metals. Before the graphite particles are incorporated into the melt, titanium, chromium, zirconium, nickel, vanadium, cobalt, manganese, niobium or phosphorus is incorporated and dispersed into the melt. The produced aluminum alloys are suitable to use as dry frictional contacts such as bearings.
    Type: Grant
    Filed: April 11, 1980
    Date of Patent: May 17, 1983
    Assignees: Hitachi, Ltd., Hitachi Chemical Company, Ltd.
    Inventors: Katsuhiro Komuro, Masateru Suwa, Koh Soeno, Masato Ohsawa