Patents by Inventor Jean-Paul Le Frere

Jean-Paul Le Frere 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 and device for electromagnetic pumping by conduction of liquid metals having low electrical conductivity
    Patent number: 3973878
    Abstract: The invention is related to a method for pumping of liquid metals having a low electrical conductivity. To lower the resistance of the conductive spire containing liquid metal to be pumped, a tape formed by a conductive metal such as copper or nickel is inserted in that spire. The tape is interrupted at the level of the air gap of the main magnetic circuit at least when the conductive spire passes through that air gap.
    Type: Grant
    Filed: February 12, 1975
    Date of Patent: August 10, 1976
    Assignee: Groupement pour les Activities Atomiques et Avancees "GAAA"
    Inventor: Jean-Paul Le Frere