Patents by Inventor Vladimir I. Farafontov

Vladimir I. Farafontov 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 of preparing polycrystalline cubic boron nitride
    Patent number: 4148863
    Abstract: According to the invention, a method of preparing polycrystalline cubic bn nitride resides in that hexagonal boron nitride is subjected to the action of pressure of 40-90 kbar and temperature of 1200.degree.-2400.degree. C. in the presence of a catalyst, namely, a zinc compound.The proposed method makes it possible to increase considerably wear resistance of polycrystalline cubic boron nitride used in tools for working hardened steels and alloys.
    Type: Grant
    Filed: June 28, 1978
    Date of Patent: April 10, 1979
    Assignee: Vsesojuzny Nauchni-Issledovatelsky Institut Abrazivov I Shlifovania
    Inventors: Vladimir I. Farafontov, Mirra I. Sokhor, Natalia G. Kushkova, Viktor V. Digonsky, Vladislav S. Lysanov