Patents by Inventor Patrick Degrigny

Patrick Degrigny 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).

  • Electrode for working plasma torch and corresponding torch
    Patent number: 5083005
    Abstract: The support for the electrode has at its end a cavity at the bottom of which there is an emissive insert made of zirconium of hafnium. A portion of the support end around the insert has at least a portion of an electroconductive material axially projecting with respect to the insert. Application to plasma cutting torches ignition by short-circuit.
    Type: Grant
    Filed: July 13, 1990
    Date of Patent: January 21, 1992
    Assignee: L'Air Liquide, Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventor: Patrick Degrigny