Patents by Inventor Leib B. Perkis

Leib B. Perkis 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 for refining melts from solid impurities
    Patent number: 4246106
    Abstract: The method provides for filtration in the field of centrifugal forces generated in a filter immersed into a layer of a melt to be refined, with the solid impurities accumulating in the filter being strained from the residual melt beyond the layer of the melt to be refined.
    Type: Grant
    Filed: June 28, 1976
    Date of Patent: January 20, 1981
    Inventors: Anatoly V. Dolgov, Leonid V. Konovalov, Leib B. Perkis, Stanislav L. Deev, Vitaly E. Dyakov, Alexandr E. Semenov, Evgeny T. Bauer, Serafim N. Suturin