Patents by Inventor Pierre Briend

Pierre Briend 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 of and plant for reliquefying gaseous helium
    Patent number: 5829269
    Abstract: Method of reliquefying gaseous helium produced when transferring liquid helium from a donor container (R1) to a receiver container (R2), characterized in that a stream of gaseous helium is bled off from a point in a compression unit (10) intended for charging with gaseous helium under pressure, this stream of gaseous helium is cooled by heat exchange with the gaseous helium intended for the compression unit (10) and the compressed gaseous helium thus cooled is expanded in order to obtain reliquefied helium.
    Type: Grant
    Filed: July 21, 1997
    Date of Patent: November 3, 1998
    Assignee: L'Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation de Procedes Georges Claude
    Inventors: Yves Pecoud, Pierre Briend, Jean-Claude Villard, Guy Gistau Baguer