Patents by Inventor Pierre Buffiere

Pierre Buffiere 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 biological purification of effluents using biofilm supporting particles
    Patent number: 6984314
    Abstract: The invention concerns a method for biological purification of effluents in mixed cultures using micro-organisms whereof part at least is fixed on solid supports. The invention is characterized in that said supports are activated so as to generate a turbulence in the reaction medium, the intensity of which is such that it reduces the production of biological sludge, the materials constituting said micro-organism supports being abraded and cleaned, while being retained in said reaction medium.
    Type: Grant
    Filed: February 15, 2002
    Date of Patent: January 10, 2006
    Assignee: Ondeo Degremont
    Inventors: Paul Etienne, Pierre Buffiere
  • Method for biological purification of effluents using biofilm supporting particles
    Publication number: 20040084368
    Abstract: The invention concerns a method for biological purification of effluents in mixed cultures using micro-organisms whereof part at least is fixed on solid supports. The invention is characterised in that said supports are activated so as to generate a turbulence in the reaction medium, the intensity of which is such that it reduces the production of biological sludge, the materials constituting said micro-organism supports being abraded and cleaned, while being retained in said reaction medium.
    Type: Application
    Filed: August 26, 2003
    Publication date: May 6, 2004
    Inventors: Paul Etienne, Pierre Buffiere
  • Incorporated cascade cooling cycle for liquefying a gas by regasifying liquefied natural gas
    Patent number: 4054433
    Abstract: The present invention relates to a cooling cycle which enables a gas to be liquefied as the result of the regasification of liquefied natural gas.In accordance with the invention, the cooling cycle consists of an incorporated cascade cycle the heat source for which is formed by liquefied natural gas in the course of regasification, and the cooling load for which is formed by gas to be liquefied.The invention is applicable to the production of liquid oxygen or nitrogen from a plant for separating air by liquefaction and distillation.
    Type: Grant
    Filed: January 27, 1976
    Date of Patent: October 18, 1977
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Jean-Pierre Buffiere, Gerard Vanderbussche