Patents by Inventor Elena A. Nekrasova

Elena A. Nekrasova 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).

  • Process for producing high-purity indium
    Patent number: 4287030
    Abstract: A process for producing high-purity indium which comprises vacuum melting of the metal in two stages: in the first stage at a temperature of from 850.degree. to 940.degree. C. for 1-5 hours; in the second stage at a temperature of from 950.degree. to 1,100.degree. C. for 0.5-2 hours. Thereafter, the metal is subjected to an electrochemical refinement in a hydrochloric acid solution, while the residue of indium evolved on the cathode is remelted by introducing into molten indium at a temperature of from 160.degree. to 400.degree. C.
    Type: Grant
    Filed: May 19, 1980
    Date of Patent: September 1, 1981
    Inventors: Arkady A. Belsky, Alexandr V. Eljutin, Valery N. Zubkov, Alexandr I. Konjukov, Lidia I. Krasinskaya, Elena A. Nekrasova, Konstantin S. Nizharadze, Larisa F. Markova, Mirra G. Mirskaya, Alexei V. Frolov, Evgeny A. Judin