Patents by Inventor Marianne Le Boulch

Marianne Le Boulch 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).

  • Electrical resistance heating element for an electric furnace and process for manufacturing such a resistance element
    Patent number: 6146550
    Abstract: This electrical resistance heating element (10) for an electric furnace comprises a resistive heating part (12) made of a ceramic. The ceramic comprises a sintered mixture of silicon carbide particles, of dopant particles, suitable for obtaining an electrically conductive phase after sintering, and of mineral particles.
    Type: Grant
    Filed: June 30, 1999
    Date of Patent: November 14, 2000
    Assignee: Electricite de France-Service National
    Inventors: Marianne Le Boulch, Thierry Chartier, Jean-Marc Laurent, Patrice Goeuriot, Fran.cedilla.ois Valdivieso