Patents by Inventor Leon Izrailevich Feldgun

Leon Izrailevich Feldgun 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).

  • Alloy for metallization and brazing of abrasive materials
    Patent number: 4009027
    Abstract: The herein-proposed alloy is characterized in that it contains apart from such known components as copper, tin, aluminium, cadmium, zinc, titanium, chromium, zirconium, manganese, molybdenum, tungsten, iron, cobalt and nickel also vanadium, niobium, tantalum and boron taken either separately or in combination, in an amount of 0.001 to 80 weight percent of the total weight of all the components thereof. The alloy is advantageous in possessing good technological characteristics, being resistant to oxidation at elevated temperatures, featuring good adhesion to all kinds of abrasive materials and giving strong brazing alloys and metallization coatings.
    Type: Grant
    Filed: November 21, 1974
    Date of Patent: February 22, 1977
    Inventors: Jury Vladimirovich Naidich, Galina Alexeevna Kolesnichenko, Leon Izrailevich Feldgun, Mark Simonovich Drui, Boris Dmitrievich Kostjuk, Nikolai Stepanovich Zjukin, Vladislav Sergeevich Lysanov, Alla Alexandrovna Lavrinovich
  • Method of testing wear resistance of articles on the basis of polycrystalline cubic boron nitride
    Patent number: 3978711
    Abstract: A method of testing wear-resistance of articles which comprises measuring the rate of propagation of ultrasonic oscillations in a reference article which has the lowest admissible wear resistance. The rate of propagation of ultrasonic oscillations in the articles being tested is compared with the rate in the reference article. The reference article is placed into a liquid in the suspended state and the articles being tested are placed into the same liquid. Those articles, which ascend to the surface, are rejected.
    Type: Grant
    Filed: August 20, 1975
    Date of Patent: September 7, 1976
    Inventors: Boris Aronovich Glagovsky, Anatoly Samoilovich Kamenkovich, Vladislav Sergeevich Lysanov, Igor Borisovich Moskovenko, Garri Shmilevich Roitshtein, Ljudmila Yakovlevna Slavina, Leon Izrailevich Feldgun, Larisa Ruvimovna Frenkel, Alexandr Lazarevich Khait, Galina Alexandrovna Shashkina, Veniamin Alexandrovich Yashin, Zinovy Illich Kremen, Yakov Abramovich Muzykant