Patents by Inventor Abram L. Sapozhnikov

Abram L. Sapozhnikov 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: 4451236
    Abstract: The dental prosthesis comprises a base from a durable corrosion-resistant metallic alloy and at least one external decorative layer. The external decorative layer is made of a harder material than the base and comprises nitrides, oxynitrides, carboxynitrides, cyanonitrides and/or oxides of metals of the subordinate subgroup of Group IV of the periodic system. The thickness ratio of the external decorative layer to the base is equal to 1:10-200 respectively.In the case where the dental prosthesis base comprises a structure of soldered members from a durable corrosion-resistant metallic alloy, the method for making the dental prosthesis comprises manufacture of the base by soldering members of the dental prosthesis from the abovementioned alloy into an integrated structure. Then the zone of the soldered juncture or the entire structure is coated, by electroplating or vacuum technique, with an additional layer from cobalt, nickel, molybdenum, chromium or zirconium, or from nitrides of chromium or molybdenum.
    Type: Grant
    Filed: August 11, 1983
    Date of Patent: May 29, 1984
    Inventors: Jury A. Tarasov, Ljudmila V. Zhivkova, Anatoly M. Kotlyar, Vasily P. Panchokha, Natalia V. Alexeenko, Anatoly I. Grabchenko, Viktor G. Lappo, Albert M. Boyarunas, Vitaly F. Drozhin, Anatoly A. Andreev, Igor V. Gavrilko, Mikhail A. Napadov, Valentin G. Padalka, Abram L. Sapozhnikov