Patents by Inventor Ivan F. Vovchanovsky

Ivan F. Vovchanovsky 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).

  • Patent number: 4164527
    Abstract: The method of preparing superhard articles consists of placing a mixture of powdered hard-alloy matrix material and diamond grains into a hard-alloy envelope formed from a hard-alloy material, preferably of exactly the same composition as the hard-alloy matrix material of the mixture, with the thickness of the hard-alloy envelope over the entire area thereof exceeding by at least 3-4 times the maximum space between any two adjacent diamond grains within the mixture. The mixture in the envelope is then subjected to sintering in a free condition thereof, without any external mechanical loads being applied thereto.
    Type: Grant
    Filed: August 16, 1976
    Date of Patent: August 14, 1979
    Inventors: Valentin N. Bakul, Ivan F. Vovchanovsky, Nekhemian V. Tsypin