Patents by Inventor Rene Lardeau

Rene Lardeau 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 for purifying inert fluids by adsorption on LSX zeolite
    Patent number: 6083301
    Abstract: Process for purifying an inert fluid, in particular argon or helium, with respect to at least one of its impurities nitrogen (N.sub.2), oxygen (O.sub.2), carbon dioxide (CO.sub.2), carbon monoxide (CO) and hydrocarbons, in which at least some of the impurities are removed using a first adsorbent of the X zeolite type having a silica to aluminum ratio less than or equal to 1.15, and a purified inert fluid containing at most 10 ppb, preferably at most 1 ppb of impurities is recovered.
    Type: Grant
    Filed: December 3, 1998
    Date of Patent: July 4, 2000
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Daniel Gary, Rene Lardeau
  • Process and device for the production of ultra-pure inert gas
    Patent number: 6047561
    Abstract: A device and a process for preparing a high-purity inert gas from air, includes the successive steps of:a) cryogenically distilling compressed air,b) recovering an impure inert fluid containing hydrogen impurities (H.sub.2) and residual impurities,c) adsorbing at least some of the residual impurities contained in the impure inert fluid by at least one bed of at least one adsorbent,d) recovering an intermediate inert fluid containing hydrogen impurities,e) removing the hydrogen impurities contained in the intermediate inert fluid by permeation, andf) recovering a high-purity inert fluid in the gas state.
    Type: Grant
    Filed: July 27, 1998
    Date of Patent: April 11, 2000
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Daniel Gary, Rene Lardeau, Jean-Yves Thonnelier
  • Process for the purification of a cryogenic fluid by filtration and/or adsorption
    Patent number: 5937672
    Abstract: Process and apparatus for the purification of a cryogenic fluid in liquid, diphase, gaseous or supercritical state, having boiling point Pe, with at least one of its impurities having a boiling point Pe', with Pe'>Pe. The process includes at least one step selected from the group comprised by:a filtration step of at least one impurity in solid state,and an adsorption step of at least one impurity in liquid or gaseous state;and in which there is recovered at least one portion of the cryogenic fluid at least partially purified.
    Type: Grant
    Filed: July 24, 1998
    Date of Patent: August 17, 1999
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Daniel Gary, Rene Lardeau, Philippe Fraysse, Frederic Castellanet
  • Process for the purification of a cryogenic fluid by filtration and/or adsorption
    Patent number: 5913893
    Abstract: Process and apparatus for the purification of a cryogenic fluid in liquid, diphase, gaseous or supercritical state, having boiling point Pe, with at least one of its impurities having a boiling point Pe', with Pe'>Pe. The process includes at least one step selected from the group comprised by:a filtration step of at least one impurity in solid state,and an adsorption step of at least one impurity in liquid or gaseous state;and in which there is recovered at least one portion of the cryogenic fluid at least partially purified.
    Type: Grant
    Filed: November 28, 1997
    Date of Patent: June 22, 1999
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Daniel Gary, Rene Lardeau, Philippe Fraysse, Frederic Castellanet
  • Process for the purification of a cryogenic fluid by filtration and/or adsorption
    Patent number: 5857356
    Abstract: Process and apparatus for the purification of a cryogenic fluid in liquid, diphase, gaseous or supercritical state, having a boiling point Pe, with at least one of its impurities having a boiling point Pe', with Pe'>Pe. The process includes at least one step selected from the group comprised by:a filtration step of at least one impurity in solid state,and an adsorption step of at least one impurity in liquid or gaseous state;and in which there is recovered at least one portion of the cryogenic fluid at least partially purified.
    Type: Grant
    Filed: January 28, 1997
    Date of Patent: January 12, 1999
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Daniel Gary, Rene Lardeau, Philippe Fraysse, Frederic Castellanet
  • Process for the purification of a cryogenic fluid by filtration and/or adsorption
    Patent number: 5836172
    Abstract: Process and apparatus for the purification of a cryogenic fluid in liquid, diphase, gaseous or supercritical state, having boiling point Pe, with at least one of its impurities having a boiling point Pe', with Pe'>Pe. The process includes at least one step selected from the group comprised by:a filtration step of at least one impurity in solid state,and an adsorption step of at least one impurity in liquid or gaseous state;and in which there is recovered at least one portion of the cryogenic fluid at least partially purified.
    Type: Grant
    Filed: November 28, 1997
    Date of Patent: November 17, 1998
    Assignee: L'Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
    Inventors: Daniel Gary, Rene Lardeau, Philippe Fraysse, Frederic Castellanet