Patents by Inventor Valentin Y. Laschev

Valentin Y. Laschev 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).

  • 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