Patents Assigned to L'Exploitation Des
  • Ozone-producing process
    Patent number: 4786489
    Abstract: Each ozonization loop (1) which includes a compressor (2), an ozonizer (3), and a heat exchanger (8) for cooling the oxygen-ozone mixture, is associated with three cylinders (4,5,6) filled with silica gel. Each cylinder operates in succession in a cocurrent adsorption, in countercurrent desorption by a substitution gas, and in scavenging by taking off a part of the flow circulating in the loop. The scavenging flow is recovered and combined with the substitution gas. The substitution gas may be in particular impure nitrogen supplyed by an air distillation apparatus producing the necessary oxygen.
    Type: Grant
    Filed: December 19, 1986
    Date of Patent: November 22, 1988
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Maurice Grenier, Pierre Petit
  • Apparatus for freezing by means of a cryogenic liquid biological products placed in straws
    Patent number: 4783973
    Abstract: A thermally insulated enclosure (1) containing a bath (20) of liquid nitrogen. The enclosure contains a case (3) of flat shape provided with a thermal insulation (4) whose performance is lower than that (2) of the enclosure (1) and comprising, on one hand, supports (17) for supporting straws in a horizontal plane, and, on the other hand, a heater (8) for heating the lower wall (7) and/or the cover (6) of the case. Application in the freezing of animal or human embryos.
    Type: Grant
    Filed: July 22, 1987
    Date of Patent: November 15, 1988
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Nicole Angelier, Joseph Bionda, Jean-Yves Thonnelier
  • Method and device for measuring by correlation, in real time, the delays between matching electrical signals
    Patent number: 4779215
    Abstract: Plural independent delay lines are connected in parallel and receive a first signal taken from a first point. Samples of the first signal are taken at different sampling frequencies and are respectively stored in the several delay lines. Samples of a second signal are taken from a second point and are stored in a direct line at one of the frequencies. The correlation function between the samples of the direct line and the samples of one of the delay lines is calculated. Exemplary applications include measuring the speed of a linearly translating object, such as a web of paper.
    Type: Grant
    Filed: March 27, 1985
    Date of Patent: October 18, 1988
    Assignees: Centre National de la Recherche Scientifique (C.N.R.S.), Centre Technique de l'Industrie des Papiers, Cartons et Celluloses (C.T.F.)
    Inventors: Eric Moisan, Jean-Paul Henrioux, Philippe Galet
  • Process for treating a food liquid with a gas
    Patent number: 4766001
    Abstract: A process for deoxygenating or carbonating a food or biological liquid product having an initial dissolved oxygen concentration between 9 mg/l and 12 mg/l, comprising injecting at least one gas selected from the group consisting of nitrogen and carbon dioxide into a current of the food or biological liquid product thereby to form a gas/liquid emulsion. The emulsion is introduced into a storage vessel. The gas is at a pressure of about 3 bars. The gas and liquid are injected into a confined mixing chamber at a volume rate of gas to liquid between 3 and 5, and expelled the chamber at a velocity of 15 to 30 meters per second into the vessel above the bottom of the vessel a distance which is a minor proportion of the height of the vessel, until the residual dissolved oxygen content is less than 0.25 mg/l.
    Type: Grant
    Filed: April 8, 1987
    Date of Patent: August 23, 1988
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Jean-Luc Mizandjian, Jean-Marc Meyer, Jean Amen
  • Process and device for detecting the activity of a substance on a micro-organism or on a mixture of micro-organisms
    Patent number: 4766063
    Abstract: The presence of fermentation inhibiting activity in a sample is determined by contacting the sample with bacterial strains and detecting the inhibition of the activity of the strains. A carrier (1) carrying microtitration cups arranged in four rows of cups (8) is provided. The cups of the same row contain a lyophilisate comprising a given bacterial strain. Each sample to be tested, effected in a tube (3), is diluted in a tube (4) containing a culture medium and bromocresol purple and then poured into the cups of a given column by means of an automatic pipette and cones (5). After incubation, a drop of janus green reagent in tube (6) is introduced in each cup and, after a new incubation, the number of cups which have produced a change in color indicates the degree of contamination of the mixture. The process may be applied in the determination of bacteriophages present in cheese-making vats.
    Type: Grant
    Filed: December 13, 1984
    Date of Patent: August 23, 1988
    Assignee: l'Air Liquide, Societe Anonyme Pour l'Etude et l'Exploitation Des Procedes Georges Claude
    Inventor: Jean-Pierre Boussemaer
  • Composition for disinfecting contact lenses
    Patent number: 4743447
    Abstract: A disinfecting solution for contact lenses, both hard lenses and flexible lenses, comprising an aqueous solution of hydrogen peroxide and peracetic acid.
    Type: Grant
    Filed: April 23, 1987
    Date of Patent: May 10, 1988
    Assignee: L'Air Liquide Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Daniel Le Rouzic, Eric J. Laforte
  • Cooling process and tunnel
    Patent number: 4741168
    Abstract: The tunnel comprises a tube (1) in which are stacked parts (A) to be cooled, and an intermediate chamber (7) which surrounds the tube and around which is disposed a heat exchanger (3). Liquid nitrogen is vaporized upwardly in the exchanger, redescends in the chamber (7) and rises in the tube (1). The supply of liquid nitrogen is controlled by a temperature probe (17). Application in the cold fitting of parts in the mechanical industry.
    Type: Grant
    Filed: January 21, 1987
    Date of Patent: May 3, 1988
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Bernard Boyer, Louis Giacinti, Jean-Yves Thonnelier
  • Cryogenic reservoir with helically wound thermal insulation
    Patent number: 4741456
    Abstract: A reservoir for a cryogenic fluid comprises a vessel with an elongated filling neck. It is thermally insulated by means of a band of thermal insulating material wound around the neck and the vessel in a plurality of superimposed layers each of which has an edge adjacent the neck and an edge remote from the neck. A cord is helically wound around the neck in a plurality of turns. Each turn of the cord contacts the adjacent edge, as defined above, of each layer.
    Type: Grant
    Filed: April 22, 1986
    Date of Patent: May 3, 1988
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Jean-Yves Faudou, Bernard Simon
  • Process and plant for purification by adsorption on activated carbon and corresponding adsorber vessel
    Patent number: 4738694
    Abstract: A gas is purified by adsorption on activated carbon contained in an adsorber vessel. The carbon is desorbed by passing an inert gas therethrough at a sufficiently high temperature. The desorbed impurity is removed by refrigeration and the refrigeration is supplied by the vaporization of an inert gas in liquid phase. This vaporized inert gas, in turn, comprises the desorption gas.
    Type: Grant
    Filed: December 22, 1986
    Date of Patent: April 19, 1988
    Assignee: L'Air Liquide Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Claude Godino, Philippe Duval, Benoit Ghnassia-Daudin
  • Apparatus for producing a jet of gas at high temperature
    Patent number: 4725715
    Abstract: A tubular case closed at its two ends respectively by a first side wall carrying two electric supply terminals and a second side wall carrying a hot gas outlet nozzle for discharging a jet of heated oxygen. A heating tube extends axially through the case constituting a heating resistance, the wall or this heating tube being provided in one of its end portions with at least one opening for the passage of the gas to the interior of the heating tube and the outlet nozzle. The case also includes a heat exchanger of thermoconductive material and gas pre-heating means.
    Type: Grant
    Filed: April 25, 1986
    Date of Patent: February 16, 1988
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Guy Salinier, Philippe Renault, Pierre Lelong, Christophe Dembinski
  • High porosity silicocalcareous mass
    Patent number: 4721698
    Abstract: A high porosity silicocalcareous mass is obtained by using in at least partial replacement of the usual silica, amorphous ultrafine synthetic silica particles having a specific surface between 150 and 300 m.sup.2 per gram, and a high absorption capacity, and optionally adding nonreactive synthetic fiber of either inorganic or organic origin to the mixture containing the particles. The high-porosity silicocalcareous mass can be used as a lining material for containers, which are intended for storing liquified or dissolved gases and also as an insulation material, such as sound insulation in building construction.
    Type: Grant
    Filed: April 4, 1986
    Date of Patent: January 26, 1988
    Assignee: L'Air Liquide--Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Maurice Bruni, Georges Delode, Rolland Perraudin
  • Process and apparatus for obtaining a mixture of substances having low boiling points
    Patent number: 4718772
    Abstract: The mixture is produced in the liquid state by first of all introducing in a reservoir (2) the most volatile substance in the liquid state and then circulating in a coiled tube (6) immersed in this liquid the other or each of the other substances in the liquid state before causing it to fall in the form of a spray in the reservoir. Application in the obtainment of reconstituted air.
    Type: Grant
    Filed: October 15, 1985
    Date of Patent: January 12, 1988
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Pierre Delacour, Roger Prost
  • Fluid heating apparatus
    Patent number: 4718481
    Abstract: A water injection device having a plurality of superposed pipes (13), and a series of tubes (5) for circulating the fluid to be heated, are disposed inside a cylindrical case (6). Interconnecting devices are fixed to the injection device and support the series of tubes, to make the injection device and series of tubes a structurally independent, removable unit. The apparatus is useful for vaporization and heating by circulation of water of liquefied gasses at low temperature such as nitrogen, oxygen, hydrogen, argon, etc.
    Type: Grant
    Filed: October 8, 1985
    Date of Patent: January 12, 1988
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventor: Daniel Delatte
  • Cryogenic fluid transferring device
    Patent number: 4716946
    Abstract: The two end members (1, 4) are locked by a self-retractable hook (15) which engages in a groove (23) in the female end member (1). The hook (15) is connected to an actuating lever (11) biased by a spring (14) and provided with a push-button (20). Pivotally mounted on the other arm of the lever (11) is a yoke (6) mounted on the male end member (4). When the transfer has finished, the hook (15) is retracted by depressing the button (20) so as to unlock the coupling. In the event of frosting, by depressing the button (20) still further, the yoke (6) upwardly urges the female member (1) and separates the two end members. Application in the transfer of liquid oxygen from a storage container to a portable container for domestic oxygen treatment.
    Type: Grant
    Filed: October 20, 1986
    Date of Patent: January 5, 1988
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventor: Philippe Grigoletto
  • Process and installation for producing nitrogen under pressure
    Patent number: 4717410
    Abstract: The rich liquid received at the base of the main column (3) at high pressure is expanded in two stages. After the first expansion to medium pressure, it is distilled so as to produce an addition of pure nitrogen. The second expansion achieves the reflux in the medium pressure column (4). Liquid nitrogen is pumped from this column to the high pressure column (3) and all the nitrogen can be produced at high pressure.
    Type: Grant
    Filed: March 6, 1986
    Date of Patent: January 5, 1988
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventor: Maurice Grenier
  • Oxygen chemical generation respiration apparatus
    Patent number: 4717549
    Abstract: An oxygen chemical generation respiration apparatus of the cartridge type intended to receive an absorbing mass in the form of pellets such as potassium superoxide pellets, is provided with a central connector (5) for intake of the gases to be purified, vertically extended as an intake conduit (5') to a clearance space (9) above the housing bottom at the level of a lower perforated wall (7) supporting the regenerating charge, this conduit coming out in the center of this wall to which it is fastened; the upper part (6) of the cartridge housing, on the output side of the gases to be treated, is provided with a series of radiators (11) parallel to the direction of circulation of the gas flows in the regenerating charge, fastened to the housing walls (12) and whose length is less than the spacing between the two walls (7) and (8).
    Type: Grant
    Filed: April 12, 1984
    Date of Patent: January 5, 1988
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Jean Malafosse, Gerard Varlot, Michel Pierre
  • Composition for checking the functioning of fire detection installations and application to various types of detectors
    Patent number: 4715985
    Abstract: Compositions for checking the functioning of fire detectors comprising at least 75% of at least one haloalkane, up to 15% of at least one volatile organic compound selected from the group consisting of alcohols, oxoderivatives, and ethers, a small amount of an organic compound having a vapor pressure less than 0.1 millibar, and an optional propellant. The composition can be used to check the functioning of ionization detectors, combustible gas detectors, and optical smoke detectors.
    Type: Grant
    Filed: October 30, 1985
    Date of Patent: December 29, 1987
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes George Claude
    Inventors: Jean-Louis Pean, Catherine Desvard, Jean-Paul Barbier
  • Waste water sludge thickener with odor control
    Patent number: 4711721
    Abstract: In a sludge thickener, supernatant fluid is drawn off via peripheral ducts and oxygenated at a suitable location. The supernatant fluid is thereafter reintroduced into the thickener via diffusers distributed transversely of the thickener and intermediate the peripheral ducts. The generation of nauseating smells is thereby prevented, and an advantageous increase of the concentration of the sludges is attained.
    Type: Grant
    Filed: June 25, 1985
    Date of Patent: December 8, 1987
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Bernard Jamonet, Alain Rigouard, Jean-Pierre Bouchez, Jean Duc
  • Apparatus for measuring the state of formation of a sheet of paper
    Patent number: 4707223
    Abstract: This invention relates to an apparatus for continuously measuring the state of formation of a sheet of paper which comprises: --means for moving a sheet of paper at a predetermined speed; --a light source directing a laser beam through said sheet; --a means for picking up the laser light transmitted, then for converting it into an electrical signal; --electronic processing means for separating this electrical signal into two components; --means for calculating from these components the index I representative of the state of formation; --a means for displaying the value of this index I; wherein the laser beam is polarized, and the apparatus further comprises, between the sheet and the means for picking up the laser light transmitted, a polarizer of which the axis of polarization is perpendicular to the axis of polarization of the laser beam transmitted.
    Type: Grant
    Filed: July 12, 1985
    Date of Patent: November 17, 1987
    Assignee: Centre Technique de l'Industrie des Papiers Cartons et Celluloses
    Inventors: Jacques Sabater, Serge Bauduin
  • Metal casting process using a lost pattern, moulds for performing this process and process for the production of said moulds
    Patent number: 4700768
    Abstract: There is disclosed a mould for lost pattern casting. The shell of the mould comprises a graphite coating and a hydrocarbon binder. The binder comprises a polyol with at least three alcohol functions such as pentaerithritol.
    Type: Grant
    Filed: May 23, 1986
    Date of Patent: October 20, 1987
    Assignees: U.C.P.I. Societe pour l'Utilisation des Ceramiques et des Platres dans l'Industrie, Messier Fonderie D'Arudy
    Inventors: Georges Broihanne, Pierre Magnier