Patents by Inventor Serge Frejaville

Serge Frejaville 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).

  • Process and container for supplying supercritical CO.sub.2
    Patent number: 4977747
    Abstract: A cylinder (1) having a plunger tube (3) contains a mass of supercritical CO.sub.2 containing 7 to 8% dissolved hydrogen, surmounted by a gaseous sky constituted by hydrogen under a pressure higher than about 120 bars. Supercritical CO.sub.2 containing several percent of dissolved hydrogen can thus be obtained by merely opening the valve (5) of the cylinder. Used in the cosmetic industry.
    Type: Grant
    Filed: September 8, 1989
    Date of Patent: December 18, 1990
    Assignee: L'Air Liquide, Society Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Serge Frejaville, Philippe Mittelman, Claude Rajaonarivello, Jean-Michel Naud
  • Process and equipment for supplying supercritical CO.sub.2
    Patent number: 4934418
    Abstract: A cylinder (11) provided with a plunger tube (28) contains a mass of supercritical CO.sub.2 containing 2 to 6% of dissolved helium, surmounted by a gaseous sky constituted by helium at a pressure higher than about 135 bars. Supercritical CO.sub.2 can be in this way obtained which contains a few % of helium dissolved by a simple opening of the valve (27) of the cylinder. Application in the cosmetic industry.
    Type: Grant
    Filed: June 3, 1988
    Date of Patent: June 19, 1990
    Assignee: Carboxyque Francaise
    Inventors: Alexandre Buiguez, Michel Percy du Sert, Serge Frejaville