Patents by Inventor Valentin Nikolaevich Bakul

Valentin Nikolaevich Bakul 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).

  • Polycrystalline diamond member and method of preparing same
    Patent number: 4104441
    Abstract: A method of preparing a polycrystalline diamond member comprising sintering diamond particles having deposited thereon, not only diamond coating, but also diamond-graphite coatingIn the epitaxial method of coating according to the invention, diamond particles may be the finest ones of a size smaller than one micron. The resulting compact member is characterized in the absence of marked graphite inclusions, and diamond cleavage between the particles results in a considerable improvement of the strength of the compact member.
    Type: Grant
    Filed: May 19, 1976
    Date of Patent: August 1, 1978
    Assignees: Institut Sverkhtverdykh Materialov SSR, Institut Fizicheskoi Khimii Akademii Nauk
    Inventors: Dmitry Valerianovich Fedoseev, Boris Vladimirovich Deryagin, Valentin Nikolaevich Bakul, Alexei Iosifovich Prikhna, Valentin Pavlovich Varnin, Stanislav Pavlovich Vnukov, Valentin Korneevich Gerasimenko, Jury Ivanovich Nikitin, Nekhemyan Veniaminovich Tsypin, Anatoly Vasilievich Hochko
  • Method of making superhard articles
    Patent number: 4097274
    Abstract: A superhard article is produced by heating in two steps a mixture of a hard-alloy matrix material and diamond grains less than 1 mm in size in a graphite press mould. During the first heating step, the mixture is heated to a temperature of 1,200.degree. C at a rate of 1,000.degree.-1,100.degree. C per minute by heating the press mould by high frequency. During the second heating step, the mixture is heated to the sintering temperature, up to 1,800.degree. C at a rate of 3,000.degree.-10,000.degree. C per minute by heating the mixture by the resistance method, i.e. by passing electric current through the mixture while simultaneously heating the press mould by high frequency currents.
    Type: Grant
    Filed: May 19, 1976
    Date of Patent: June 27, 1978
    Inventors: Valentin Nikolaevich Bakul, Igor Ivanovich Bilyk, Dolores Khaimovna Bronshtein, Ivan Fedorovich Vovchanovsky, Nekhemian Veniaminovich Tsypin