Patents by Inventor Alexandr Y. Fridman

Alexandr Y. Fridman 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).

  • Gold-plating electrolyte and process for preparing same
    Patent number: 4497696
    Abstract: A gold-plating electrolyte which has the following composition, g/l:______________________________________ hexapotassium-m-ethylenediamine-tetraacetobis- 10.5-210 (aurous sulphite) alkali metal salts of ethylenediamine- 17.8-140 tetraacetic acid distilled water the balance. ______________________________________The electrolyte can also incorporate additives--ethylenediaminetetraacetocopper (II)-bis(2-aminoethylammonium) or ethylenediamine tetraacetocadmium-bis-(2-aminoethylammonium) in an amount of from 0.01 to 15 g/l.The process for preparing the gold-plating electrolyte comprises interaction of the reagents--chloroauric acid, salts of alkali metals of ethylenediamineteteraacetic acid, an alkali metal sulphite, caustic potash and ammonium chloride; this process is effected in one stage in distilled water at a temperature of 80.degree.-90.degree. C., the components being present in the following proportions, g/l: ______________________________________ chloroauric acid 12.
    Type: Grant
    Filed: January 18, 1982
    Date of Patent: February 5, 1985
    Inventors: Elena V. Shemyakina, Nina M. Dyatlova, Alexandr I. Formenov, Alexandr V. Belikin, Alexandr Y. Fridman, Nina I. Sinko, Iosif G. Erusalimchik, Galina I. Efimova, Julian P. Zavalsky
  • Gold-plating electrolyte
    Patent number: 4212708
    Abstract: The gold-plating electrolyte of the present invention contains the components in the following proportions, g/l:hexapotassium .mu.-ethylenediaminotetracetate bis(aurous sulphite):10.5-123.0a salt of an alkali metal of ethylenediaminotetracetic acid: 17.8-140.0potassium sulphate:12.6-11.0potassium hydrogen phosphate:4.7-40.0water:the balanceThe gold-plating electrolyte of this invention is useful in the preparation of gold reactants for electronics, watch-making, jewelry, radio-engineering.
    Type: Grant
    Filed: June 5, 1979
    Date of Patent: July 15, 1980
    Inventors: Nina A. Smagunova, Nina M. Dyatlova, Alexandr Y. Fridman, Elena V. Shemyakina, Vera Y. Temkina, Ljudmila K. Nikerova, Alexandr V. Belikin