Patents by Inventor Leonid M. Pokrass

Leonid M. Pokrass 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).

  • Exothermic slag-forming mixture
    Patent number: 4177070
    Abstract: The present invention resides essentially in that a proposed mixture comprises an aluminium powder, nitre and a silica-containing component, the mixture composition, according to the invention, incorporating, apart from said constituents, calcium oxide, expanded pearlite or fluorspar, and a silicon-containing component. The proposed mixture provides for the burning thereof with subsequent formation of molten slag therefrom adapted for refining steel in a ladle.
    Type: Grant
    Filed: April 27, 1978
    Date of Patent: December 4, 1979
    Inventors: Leonid I. Krupman, Jury G. Yaroslavtsev, Alexandr E. Sochnev, Jury P. Shamil, Abram I. Khitrik, Grigory I. Antipenko, Jury G. Smetanin, Albert N. Samsonov, Vadim M. Ljudkovsky, Leonid M. Pokrass, Anatoly A. Kurdjukov, Abram M. Ofengenden, Georgy G. Zhitnik
  • Method of refining of metal
    Patent number: 4140522
    Abstract: A method for refining a quantity of metal by a correlated quantity of fluid slag comprising discharging the metal to be refined as a stream into a refining vessel and discharging the slag into the vessel in a stream which strikes the metal stream. The slag is discharged in an amount equal to 50% of the total slag content before the discharge of 20% of the metal is completed, the discharge of slag being halted while continuing the discharge of the metal until 50% of the metal has been discharged. The discharge of the remaining 50% of the slag content is resumed as a stream striking the metal stream during the time when the remaining 50% of the metal is discharged.
    Type: Grant
    Filed: January 16, 1975
    Date of Patent: February 20, 1979
    Inventors: Leonid I. Krupman, Alexandr E. Sochnev, Boris V. Gavronsky, Sergei P. Efimenko, Leonid M. Pokrass, Alexandr P. Voropaev, Vakhtang V. Mosiashvili, Valentin Y. Laschev, Abram M. Ofengenden