Patents by Inventor Taijiro Onishi

Taijiro Onishi 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 production of coated super-hard alloy articles
    Patent number: 4463033
    Abstract: A cutting tool or a wear-resistant mechanical part comprises: a substrate of WC, Co, TiC, and TaC with or without an inner coating layer of TiC, TiN or TiCN; an intermediate layer of a titanium oxycarbide formed on the surface of the substrate or the inner coating layer by carrying out a reaction thereon at a temperature of 800.degree. to 1,200.degree. C. of a halide of titanium, hydrogen, and carbon monoxide or carbon dioxide or a mixture thereof; and an outer coating layer of aluminum oxide formed on the outer surface of the intermediate layer. The thicknesses of the inner layer, the intermediate layer, and the outer coating layer are of the order of 0.5 to 20 microns, 0.5 to 20 microns, and 0.5 to 10 microns, respectively.
    Type: Grant
    Filed: July 17, 1981
    Date of Patent: July 31, 1984
    Assignee: Mitsubishi Kinzoku Kabushiki Kaisha
    Inventors: Noribumi Kikuchi, Yasuo Suzuki, Taijiro Onishi, Fumio Washizu