Patents by Inventor Henry Ledon

Henry Ledon 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).

  • Patent number: 8247392
    Abstract: Compounds of formula (I) are disclosed. The tetrapyrole ring in formula (I) can be substituted with a metal cation (M); R1, R2, R3 and R4 separately represent a hydrogen atom, a C1-4 alkyl or alkyloxy radical, or a phenyl radical optionally substituted by vinyl, hydroxy, nitro, amino, bromo, chloro, fluoro, iodo, benzyloxy, or hydroxymethyl radicals; R5, R6, R7 and R8 separately represent a hydrogen atom or a C1-4 alkyl radical; Ra, Rb and Rc separately represent a hydrogen atom, a C1-4 alkyl or alkyloxy radical optionally substituted by a halogen, or a phenyl radical optionally substituted by vinyl, hydroxy, nitro, amino, bromo, chloro, fluoro, iodo, benzyloxy, or hydroxymethyl radicals, wherein at least one of Ra, Rb, and Rc is a phenyl radical. Compounds of formula (I) bound to a silica, a sol-gel material or a mesoporous silica are useful for selective trapping of carbon monoxide.
    Type: Grant
    Filed: July 19, 2002
    Date of Patent: August 21, 2012
    Assignee: Centre National de la Recherche Scientifique (C.N.R.S.)
    Inventors: François Jerome, Géraud Dubois, Stéphane Brandes, Gabriel Canard, Jean-Michel Barbe, Roger Guilard, Bruno Roux-Fouillet, Henry Ledon
  • Patent number: 7659393
    Abstract: A method of preparing cyclene having formula (I) from triethylenetetraamine having formula (VIII) or ethylenediamine having formula (VIII?) includes a series of steps. The first series of steps (I) includes a step A (one-pot preparation of the compound having formula (IIa) from the compound having formula (VIII)), followed by a step B (transforming the compound having formula (IIa) into cyclene having formula (I)). The second series of steps (II) includes a step C (preparing the compound having formula (IIb) from the compound having formula (VIII)), followed by a step D (transforming the compound having formula (IIb) into cylcene having formula (I)). The third series of steps (III) includes a step E involving the onepot preparation of the compound having formula (IIa) from the compound having formula (VIII), followed by a step B involving the transformation of the compound having formula (IIa) into cyclene having formula (I).
    Type: Grant
    Filed: June 4, 2004
    Date of Patent: February 9, 2010
    Assignee: Centre National de la Recherche Scientifique (C.N.R.S.)
    Inventors: Frederic Boschetti, Fanny Chaux, Franck Denat, Roger Guilard, Henry Ledon
  • Patent number: 7517512
    Abstract: The invention concerns a method for preparing organic-inorganic hybrid materials with controlled porosity and functionality comprising hydrolysis and condensation polymerization of a compound of formula (I): Z-R1—Si(OR)(OR?)(OR?), with an alkaline or alkaline-earth silicate in a mol ratio of (I)/(silicate)=1:9, in the presence of a non-ionic surfactant, to form a mesoporous silica represented by Z-R1—SiO1.5 9 SiO2, whereon is then anchored an organic compound, represented by (?)N—H, comprising a —NH— group capable of reacting with Z, to form a functionalized mesoporous silica represented by (?)N—R—SiO1.5 9 SiO2, which is optionally complexed with a metallic cation to form an organometallic complex. The invention also concerns the use of these materials to separate gases.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: April 14, 2009
    Assignee: Centre National de la Recherche-Scientifique
    Inventors: Robert Corriu, Ahmad Mehdi, Catherine Reye, Henry Ledon, Roger Guilard, Stéphane Brandes, Chloé Thieuleux
  • Patent number: 7452845
    Abstract: The invention concerns a method for preparing organic-inorganic hybrid materials with controlled porosity and functionality comprising hydrolysis and condensation polymerization of a compound of formula (I): Z-R1—Si(OR)(OR?)(OR?), with an alkaline or alkaline-earth silicate in a mol ratio of (I)/(silicate)=1:9, in the presence of a non-ionic surfactant, to form a mesoporous silica represented by Z-R1—SiO1.5 9 SiO2, whereon is then anchored an organic compound, represented by (?)N—H, comprising a —NH— group capable of reacting with Z, to form a functionalized mesoporous silica represented by (?)N—R—SiO1.5 9 SiO2, which is optionally complexed with a metallic cation to form an organometallic complex. The invention also concerns the use of these materials to separate gases.
    Type: Grant
    Filed: March 21, 2002
    Date of Patent: November 18, 2008
    Assignee: Centre National de la Recherche Scientifique
    Inventors: Robert Corriu, Ahmad Mehdi, Catherine Reye, Henry Ledon, Roger Guilard, Stéphane Brandes, Chloé Thieuleux
  • Publication number: 20080268524
    Abstract: The invention relates to a method of producing lyophilized microorganisms, such as lyophilized bacteria, of the type in which a culture medium is inoculated with one or more strains of microorganisms during one of the steps of the method. The invention is characterised in that, prior to the inoculation step, the culture medium is treated with a treatment gas comprising an inert gas or a reducing gas or a mixture of such inert and reducing gases, in order to obtain a determined redox potential value Eh for the medium, which is less than the value obtained when the medium is in equilibrium with the air.
    Type: Application
    Filed: February 16, 2006
    Publication date: October 30, 2008
    Inventors: Remy Cachon, Carole Delbeau, Gilles Feron, Henry Ledon
  • Patent number: 7393380
    Abstract: A method for guaranteeing at least one characteristic of a fluid used for producing food products. This method utilizes a system for piping and delivering the fluid, combined with means for producing the products, in order to use the fluid for producing the products; the measuring a value of the characteristic; the comparing the measured value with a predetermined threshold value; the act of executing an action if the measured value departs from the threshold value; the combining the measured value with first information for identifying at least one product; and then the storing the associated value and the associated information.
    Type: Grant
    Filed: December 4, 2002
    Date of Patent: July 1, 2008
    Assignee: L'Air Liquide, Societe Anonyme A Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Jean-François Vie, Henry Ledon, Philippe Girardon, Christel Girault
  • Publication number: 20080152561
    Abstract: The invention concerns a method for preparing organic-inorganic hybrid materials with controlled porosity and functionality comprising hydrolysis and condensation polymerization of a compound of formula (I): Z-R1—Si(OR)(OR?)(OR?), with an alkaline or alkaline-earth silicate in a mol ratio of (I)/(silicate)=1:9, in the presence of a non-ionic surfactant, to form a mesoporous silica represented by Z-R1—SiO1.5 9 SiO2, whereon is then anchored an organic compound, represented by (?)N—H, comprising a —NH— group capable of reacting with Z, to form a functionalized mesoporous silica represented by (?)N—R—SiO1.5 9 SiO2, which is optionally complexed with a metallic cation to form an organometallic complex. The invention also concerns the use of these materials to separate gases.
    Type: Application
    Filed: March 6, 2008
    Publication date: June 26, 2008
    Applicant: Centre National De La Recherche-Scientifique
    Inventors: Robert Corriu, Ahmad Mehdi, Catherine Reye, Henry Ledon, Roger Guilard, Stephane Brandes, Chloe Thieuleux
  • Patent number: 7312327
    Abstract: The invention relates to a method of preparing nitrogen macrocycles having formula (I). The inventive method comprises a step involving the reaction of compounds (II) and (III) in order to form a compound having formula (IV). Said compound is subsequently made to react with a compound having formula (V) in order to form a compound having formula (VI).
    Type: Grant
    Filed: September 27, 2002
    Date of Patent: December 25, 2007
    Assignees: Centre National de la Recherche Scientifique (C.N.R.S.), Commissariat a l'energie Atomique
    Inventors: Frederic Boschetti, Franck Denat, Roger Guilard, Henry Ledon, Herve Chollet, Jean-Louis Babouhot
  • Patent number: 7276104
    Abstract: An apparatus and method for producing products using a fluid, which enables one to control the quality of the fluid from the point of production to the point of use, monitored on a microbiological, physical, and chemical basis. At least one sensor for the acquisition of purity information and a system for storing such purity information is included.
    Type: Grant
    Filed: December 3, 2002
    Date of Patent: October 2, 2007
    Assignee: L'Air Liquide, Societe Anonyme A Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Jean-François Vie, Henry Ledon, Philippe Girardon, Christel Girault
  • Publication number: 20070092605
    Abstract: Processes for producing dairy products. A fermented dairy product, of the type where, during one of the steps of the production process, a milk mixture is seeded with one or more strains of lactic acid bacteria. Before the seeding step, the milk mixture is treated with a treatment gas containing hydrogen, so as to obtain a desired redox potential value Eh of the milk mixture that is less than the value obtained when the milk mixture is in equilibrium with air.
    Type: Application
    Filed: October 21, 2005
    Publication date: April 26, 2007
    Inventors: Remy Cachon, Gilles Feron, Carole Delbeau, Dominique Ibarra, Henry Ledon
  • Publication number: 20070059414
    Abstract: Methods and apparatus for inhibiting growth and quorum sensing mechanisms in food-borne microorganisms by simultaneously exposing a food product to an antimicrobial gas mixture and a treating agent adapted to inhibit signaling between the microorganisms.
    Type: Application
    Filed: July 28, 2006
    Publication date: March 15, 2007
    Inventors: John Novak, James Yuan, Henry Ledon
  • Publication number: 20070059200
    Abstract: Methods and apparatuses are provided for sanitizing food contact surfaces and food processing equipment using a combination of carbon dioxide (CO2) and antimicrobial chemicals. Generally, the invention provides a method for antimicrobial sanitation, comprising placing an object in a vessel containing an antimicrobial chemical, providing CO2 into the vessel, and removing the object from the vessel after a given treatment time during which the object is exposed to the provided CO2 and the antimicrobial chemical.
    Type: Application
    Filed: July 14, 2006
    Publication date: March 15, 2007
    Inventors: James Yuan, Henry Ledon, John Novak
  • Publication number: 20060287195
    Abstract: The invention concerns compounds of formula (I), wherein: R1, R2, R3 and R4 represent a hydrogen atom, an alkyl radical comprising 1 to 4 carbon atoms, a phenyl radical optionally substituted by one or several groups selected among vinyl, hydroxy, nitro, amino, bromo, chloro, fluoro, iodo, benzyloxy radicals, alkyl or alkyloxy radicals comprising 1 to 4 carbon atoms optionally substituted by one or several bromo, chloro, fluoro or iodo groups; R5, R6, R7 and R8 represent a hydrogen atom or an alkyl radical comprising 1 to 4 carbon atoms; Ra, Rb, and Rc represent a hydrogen atom, a phenyl radical optionally substituted by one or several groups selected among the vinyl, hydroxy, nitro, amino, bromo, chloro, fluoro, iodo, benzyloxy radicals, alkyl or alkyloxy radicals comprising 1 to 4 carbon atoms, optionally substituted by one or several bromo, chloro, fluoro or iodo groups.
    Type: Application
    Filed: July 19, 2002
    Publication date: December 21, 2006
    Inventors: Francois Jerome, Geraud Dubois, Stephane Brandes, Gabriel Canard, Roger Bretigny, Bruno Roux-Fouillet, Henry Ledon
  • Publication number: 20060217548
    Abstract: A method of preparing cyclene having formula (I) from triethylenetetraamine having formula (VIII) or ethylenediamine having formula (VIII?) includes a series of steps. The first series of steps (I) includes a step A (one-pot preparation of the compound having formula (IIa) from the compound having formula (VIII)), followed by a step B (transforming the compound having formula (IIa) into cyclene having formula (I)). The second series of steps (II) includes a step C (preparing the compound having formula (IIb) from the compound having formula (VIII)), followed by a step D (transforming the compound having formula (IIb) into cylcene having formula (I)). The third series of steps (III) includes a step E involving the one-pot preparation of the compound having formula (IIa) from the compound having formula (VIII), followed by a step B involving the transformation of the compound having formula (IIa) into cyclene having formula (I).
    Type: Application
    Filed: June 4, 2004
    Publication date: September 28, 2006
    Inventors: Frèderic Boschetti, Fanny Chaux, Franck Denat, Roger Guilard, Henry Ledon
  • Publication number: 20050129807
    Abstract: This disclosure discusses methods of preserving and carbonating beverages. The invention provides a method of injecting carbon dioxide containing gas into a liquid, such as a carbonated alcoholic beverage or beer, to obtain a first pressure, which is held constant for a desired length of time. The pressure is then reduced to a final second pressure, whereby retaining a sufficient level of carbon dioxide in the liquid. The carbon dioxide containing gas may be carbon dioxide or mixtures of carbon dioxide and an inert gas. The desired effects include reduction in beer spoilage microorganisms, reduction of dissolved oxygen in the liquid, inhibition of enzymes in the stored liquid, and being able to obtain a target level of dissolved gas in the liquid.
    Type: Application
    Filed: October 22, 2004
    Publication date: June 16, 2005
    Inventors: James Yuan, Henry Ledon
  • Publication number: 20050106062
    Abstract: The invention concerns a method comprising steps which consist in: providing a system (8) for transporting and dispensing the fluid associated with means (5) for producing the products (3) to use the fluid for producing the products; measuring a value of the characteristic; comparing the measured value to a predetermined threshold; carrying out an action if the measured value exceeds the threshold value; associating the measured value with a first information identifying at least a product (3); and storing the associated value and information.
    Type: Application
    Filed: December 4, 2002
    Publication date: May 19, 2005
    Inventors: Jean-Francois Vie, Henry Ledon, Philippe Girardon, Christel Girault
  • Publication number: 20050061751
    Abstract: An apparatus and method for producing products using a fluid, which enables one to control the quality of the fluid from the point of production to the point of use, monitored on a microbiological, physical, and chemical basis. At least one sensor for the acquisition of purity information and a system for storing such purity information is included.
    Type: Application
    Filed: December 3, 2002
    Publication date: March 24, 2005
    Inventors: Jean-Francois Vie, Henry Ledon, Philippe Girardon, Christel Girault
  • Publication number: 20040206940
    Abstract: The invention relates to a method of preparing nitrogen macrocycles having formula (I). The inventive method comprises a step involving the reaction of compounds (II) and (III) in order to form a compound having formula (IV). Said compound is subsequently made to react with a compound having formula (V) in order to form a compound having formula (VI).
    Type: Application
    Filed: March 26, 2004
    Publication date: October 21, 2004
    Inventors: Frederic Boschetti, Franck Denat, Roger Guilard, Henry Ledon, Herve Chollet, Jean-Louis Babouhot
  • Publication number: 20030170356
    Abstract: A method of processing a substance, such as a food item, utilizing high pressure processing includes providing an enclosed environment including the substance and one or more of the following gases: carbon monoxide, carbon dioxide, nitrogen, nitric oxide, nitrous oxide, hydrogen, oxygen, helium, argon, krypton, xenon and neon. The enclosed environment including the substance and at least one gas is subjected to high pressure processing and sealed in a container. The high pressure processing may occur prior to or after sealing the substance in the container. Control of the amount and type of gases in the enclosed environment including the substance enhances the biocidal efficacy of high pressure processing as well as ensuring desirable sensory qualities of the substance during storage.
    Type: Application
    Filed: January 15, 2003
    Publication date: September 11, 2003
    Inventors: James T.C. Yuan, Henry Ledon
  • Patent number: 6274114
    Abstract: Process for preparing hydrogen peroxide, comprising the following steps: a) a step of reduction of dioxygen in acidic medium with a hydrophobic organometallic complex, and b) a step of separation of the oxidized organometallic complex resulting from step a) and of the hydrogen peroxide by liquid/liquid extraction.
    Type: Grant
    Filed: June 16, 1999
    Date of Patent: August 14, 2001
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Henry Ledon, Roger Guillard, Alain Tabard, Guy Royal, Gregory Broeker