Patents by Inventor Philippe Brosseau

Philippe Brosseau 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 filling gas-insulated electric current transmission lines with gas and process for manufacturing lines which incorporates such a filling method
    Patent number: 6418980
    Abstract: A method for filling a gas-insulated electric current transmission line with gas using an insulating gas mixture, which line comprises an outer tubular sheath, at least one conductor internal to the sheath and coaxial with this sheath, and a space lying between the at least one conductor and the outer sheath, comprising the steps of: a) applying at least one purging cycle to the space comprising: a pumping step, down to a first vacuum level; a purge step comprising introducing a purge gas and obtaining a first internal atmosphere including the purge gas; b) applying to the space a filling cycle comprising: a pumping step, down to a second vacuum level; a filling step using the insulating gas to obtain a second internal atmosphere.
    Type: Grant
    Filed: December 23, 1999
    Date of Patent: July 16, 2002
    Assignee: L'Air Liquide Societe Anonyme a Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Christian Larquet, Bertrand Dutournier, Philippe Brosseau, Jean-Louis Dumas