Patents by Inventor Alexander Lesnewich

Alexander Lesnewich 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).

  • Methods for dissolving volatile addition agents in molten metal
    Patent number: 4057420
    Abstract: Methods and apparatus for introducing addition agents into molten metal retained in a vessel include providing a wire comprised of a metallic sheath encapsulating powdered and/or solid addition agents, preheating the wire with a controlled electrical current while feeding the preheated wire into the molten metal such that the metal sheath and addition agents melt before the wire contacts a vessel wall and the addition agents homogeneously dissolve at a predetermined rate in the molten metal. Also, the addition agents may be selected so as to react with impurities such as oxygen, sulfur, etc. to enable the removal thereof from the molten metal.
    Type: Grant
    Filed: February 6, 1976
    Date of Patent: November 8, 1977
    Assignee: Airco, Inc.
    Inventors: Arthur A. Brace, Alexander Lesnewich