Patents by Inventor Noriyuki Ayano

Noriyuki Ayano 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 the production of tungsten carbide or mixed metal carbides
    Patent number: 4008090
    Abstract: A process for the production of tungsten carbide or mixed metal carbides, which comprises mixing tungsten oxide powder of mixed high melting point metal oxide powders with carbon powder in an amount sufficient to form the corresponding carbide, heating the mixture at a temperature of higher than 1000.degree. C in an inert atmosphere or in vacuum to reduce the oxygen content and then heating at a temperature of higher than 1400.degree. C in hydrogen atmosphere, thereby to form tungsten carbide or mixed metal carbides directly from the corresponding oxide.
    Type: Grant
    Filed: September 2, 1975
    Date of Patent: February 15, 1977
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Masaya Miyake, Akio Hara, Noriyuki Ayano