Patents by Inventor Valentin Valtchev

Valentin Valtchev 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: 11446626
    Abstract: The present invention relates to a method for the preparation of a colloidal aqueous suspension of stable zeolite nanocrystals having framework structures comprising at least one cation selected from Gd, Fe, Cu and Ce, said structures being loaded with a gas selected from O2, CO2 and mixtures thereof, to the colloidal aqueous suspension of zeolite nanocrystals obtained by such a process, and to the use of said suspension in therapy, more particularly in cancer therapy and hypoxia-related diseases and/or in diagnosis.
    Type: Grant
    Filed: August 7, 2018
    Date of Patent: September 20, 2022
    Assignees: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, UNIVERSITE DE CAEN NORMANDIE
    Inventors: Samuel Valable, Svetlana Mintova Lazarova, Clément Anfray, Valentin Valtchev, Omar Touzani, Myriam Bernaudin
  • Publication number: 20220008901
    Abstract: The present invention relates to a method of post-synthetic downsizing zeolite-type crystals and/or agglomerates thereof to nanosized particles, and in particular a heating-free and chemical-free method. The present invention also relates to nanosized particles of zeolite-type material capable of being obtained by the method of the invention and to the use of such particles as a catalyst or catalyst support for heterogeneous catalyst, or as molecular sieve, or as a cation exchanger.
    Type: Application
    Filed: November 14, 2019
    Publication date: January 13, 2022
    Inventors: Valentin VALTCHEV, Kamila GOLDYN, Svetlana MINTOVA LAZAROVA, Jean-Pierre GILSON
  • Patent number: 10919028
    Abstract: The present invention relates to a method for the preparation of faujasite nanocrystals, to faujasite nanocrystals, to a method for the preparation of a stable colloidal suspension of faujasite nanocrystals, to a stable colloidal suspension of faujasite nanocrystals, and to the use of said faujasite nanocrystals and said stable colloidal suspension of faujasite nanocrystals in various applications.
    Type: Grant
    Filed: December 30, 2013
    Date of Patent: February 16, 2021
    Assignee: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
    Inventors: Svetlana Mintova, Hussein Awala, Jean-Pierre Gilson, Valentin Valtchev
  • Patent number: 10894246
    Abstract: Catalyst compositions comprising an inorganic porous material with pore diameters of at least 2 nm and of crystals of molecular sieve, characterized in that the crystals of molecular sieve have an average diameter, measured by scanning electron microscopy, not bigger than 50 nm, and in that the catalyst composition presents a concentration of acid sites ranges from 50 to 1200 ?mol/g measured by TPD NH3 adsorption; and the XRD pattern of said catalyst composition is the same as the X ray diffraction pattern of said inorganic porous material.
    Type: Grant
    Filed: February 6, 2019
    Date of Patent: January 19, 2021
    Assignee: TOTAL RESEARCH & TECHNOLOGY FELUY
    Inventors: Kok-Giap Haw, Jean-Michel Goupil, Jean-Pierre Gilson, Valentin Valtchev, Nikolai Nesterenko, Delphine Minoux, Jean-Pierre Dath
  • Publication number: 20200238242
    Abstract: The present invention relates to a method for the preparation of a colloidal aqueous suspension of stable zeolite nanocrystals having framework structures comprising at least one cation selected from Gd, Fe, Cu and Ce, said structures being loaded with a gas selected from O2, CO2 and mixtures thereof, to the colloidal aqueous suspension of zeolite nanocrystals obtained by such a process, and to the use of said suspension in therapy, more particularly in cancer therapy and hypoxia-related diseases and/or in diagnosis.
    Type: Application
    Filed: August 7, 2018
    Publication date: July 30, 2020
    Inventors: Samuel VALABLE, Svetlana MINTOVA LAZAROVA, Clément ANFRAY, Valentin VALTCHEV, Omar TOUZANI, Myriam BERNAUDIN
  • Patent number: 10647585
    Abstract: The present invention relates to a method for the preparation of a synthetic crystalline zeolite material, to said synthetic crystalline zeolite material, and to the uses of said method and said synthetic crystalline zeolite material in various applications.
    Type: Grant
    Filed: July 8, 2015
    Date of Patent: May 12, 2020
    Assignee: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
    Inventors: Valentin Valtchev, Jean-Pierre Gilson, Zhengxing Qin
  • Publication number: 20190168194
    Abstract: Catalyst compositions comprising an inorganic porous material with pore diameters of at least 2 nm and of crystals of molecular sieve, characterized in that the crystals of molecular sieve have an average diameter, measured by scanning electron microscopy, not bigger than 50 nm, and in that the catalyst composition presents a concentration of acid sites ranges from 50 to 1200 ?mol/g measured by TPD NH3 adsorption; and the XRD pattern of said catalyst composition is the same as the X ray diffraction pattern of said inorganic porous material.
    Type: Application
    Filed: February 6, 2019
    Publication date: June 6, 2019
    Inventors: Kok-Giap Haw, Jean-Michel Goupil, Jean-Pierre Gilson, Valentin Valtchev, Nikolai Nesterenko, Delphine Minoux, Jean-Pierre Dath
  • Patent number: 10239051
    Abstract: A catalyst composition contains an inorganic porous material with pore diameters of at least 2 nm and of crystals of molecular sieve. The crystals of molecular sieve have an average diameter, measured by scanning electron microscopy, not bigger than 50 nm. The catalyst composition has a concentration of acid sites ranges from 50 to 1200 ?mol/g measured by TPD NH3 adsorption. An XRD pattern of the catalyst composition is the same as an XRD pattern of the inorganic porous material.
    Type: Grant
    Filed: July 3, 2014
    Date of Patent: March 26, 2019
    Assignees: TOTAL RESEARCH & TECHNOLOGY FELUY, CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS
    Inventors: Kok-Giap Haw, Jean-Michel Goupil, Jean-Pierre Gilson, Valentin Valtchev, Nikolai Nesterenko, Delphine Minoux, Jean-Pierre Dath
  • Publication number: 20180194635
    Abstract: The present invention relates to a method for the preparation of a synthetic crystalline zeolite material, to said synthetic crystalline zeolite material, and to the uses of said method and said synthetic crystalline zeolite material in various applications.
    Type: Application
    Filed: July 8, 2015
    Publication date: July 12, 2018
    Inventors: Valentin VALTCHEV, Jean-Pierre GILSON, Zhengxing QIN
  • Patent number: 9770505
    Abstract: A vaccine composition comprising at least one antigen and one adjuvant, characterized in that the adjuvant comprises sterile-filterable nanoparticles comprising pseudo-boehmite and polyacrylate.
    Type: Grant
    Filed: July 12, 2012
    Date of Patent: September 26, 2017
    Assignee: SANOFI PASTEUR
    Inventors: Yannick Mathieu, Benedicte Lebeau, Valentin Valtchev, Joel Patarin, Marie Garinot, Jean Haensler, Elisabeth Sauzeat
  • Publication number: 20160325271
    Abstract: The present invention relates to a method for the preparation of faujasite nanocrystals, to faujasite nanocrystals, to a method for the preparation of a stable colloidal suspension of faujasite nanocrystals, to a stable colloidal suspension of faujasite nanocrystals, and to the use of said faujasite nanocrystals and said stable colloidal suspension of faujasite nanocrystals in various applications.
    Type: Application
    Filed: December 30, 2013
    Publication date: November 10, 2016
    Inventors: Svetlana Mintova, Hussein Awala, Jean-Pierre Gilson, Valentin Valtchev
  • Publication number: 20160136625
    Abstract: A catalyst composition contains an inorganic porous material with pore diameters of at least 2 nm and of crystals of molecular sieve. The crystals of molecular sieve have an average diameter, measured by scanning electron microscopy, not bigger than 50 nm. The catalyst composition has a concentration of acid sites ranges from 50 to 1200 ?mol/g measured by TPD NH3 adsorption. An XRD pattern of the catalyst composition is the same as an XRD pattern of the inorganic porous material.
    Type: Application
    Filed: July 3, 2014
    Publication date: May 19, 2016
    Inventors: Kok-Giap HAW, Jean-Michel GOUPIL, Jean-Pierre GILSON, Valentin VALTCHEV, Nikolai NESTERENKO, Delphine MINOUX, Jean-Pierre DATH
  • Patent number: 8258071
    Abstract: The invention relates to a catalyst that comes in the form of grains, each grain consisting of a core covered by at least one external layer, the core consisting of an acidic porous solid and having a size of between 0.1 micron and 0.4 millimeter, in which the external layer has a uniform thickness with a uniformity criterion C, which is less than 0.30, whereby said uniformity criterion C is defined as being equal to an average, on a number N of catalyst grain samples, of the ratio of the difference between the maximum thickness, Eimax, of the external layer and the minimum thickness, Eimin, of this same layer to the average of these two thicknesses Eimax and Eimin.
    Type: Grant
    Filed: January 13, 2005
    Date of Patent: September 4, 2012
    Assignee: IFP Energies nouvelles
    Inventors: Younes Bouizi, Valentin Valtchev, Loiec Rouleau, Nicolas Bats, Laurent Simon
  • Patent number: 8043988
    Abstract: The invention relates to a FAU-type zeolite membrane that comprises a FAU-type zeolite crystal layer incorporated in the surface porosity of at least one selected face of a porous substrate, in which the ratio between the thickness of said zeolite layer incorporated in the surface porosity of said selected face of the substrate and the total thickness of said zeolite layer is at least 70%. It also relates to processes for preparation and application of these membranes.
    Type: Grant
    Filed: July 23, 2008
    Date of Patent: October 25, 2011
    Assignee: IFP Energies Nouvelles
    Inventors: Florent Guillou, Gerhard Pirngruber, Loïc Rouleau, Valentin Valtchev
  • Publication number: 20090036294
    Abstract: The invention relates to a catalyst that comes in the form of grains, each grain consisting of a core covered by at least one external layer, the core consisting of an acidic porous solid and having a size of between 0.1 micron and 0.4 millimeter, in which the external layer has a uniform thickness with a uniformity criterion C, which is less than 0.30, whereby said uniformity criterion C is defined as being equal to an average, on a number N of catalyst grain samples, of the ratio of the difference between the maximum thickness, Eimax, of the external layer and the minimum thickness, Eimin, of this same layer to the average of these two thicknesses Eimax and Eimin.
    Type: Application
    Filed: January 13, 2005
    Publication date: February 5, 2009
    Inventors: Younes Bouizi, Valentin Valtchev, Loiec Rouleau, Nicolas Bats, Laurent Simon
  • Publication number: 20090029845
    Abstract: The invention relates to a FAU-type zeolite membrane that comprises a FAU-type zeolite crystal layer incorporated in the surface porosity of at least one selected face of a porous substrate, in which the ratio between the thickness of said zeolite layer incorporated in the surface porosity of said selected face of the substrate and the total thickness of said zeolite layer is at least 70%. It also relates to processes for preparation and application of these membranes.
    Type: Application
    Filed: July 23, 2008
    Publication date: January 29, 2009
    Inventors: Florent Guillou, Gerhard Pirngruber, Loic Rouleau, Valentin Valtchev
  • Publication number: 20050266984
    Abstract: The invention involves a process for production of macrostructures of a microporous material. The process is characterized by the fact that seeds formed in or introduced by ion exchange or adsorption to a porous organic ion exchanger with the desired size, shape and porosity are made to grow and form a continuous structure by further deposition of inorganic material from a synthesis solution under hydrothermal conditions. The organic ion exchanger can be eliminated by chemical destruction or dissolution and, in so doing, leaves behind an inorganic microporous structure with the size and shape of the employed organic ion exchanger.
    Type: Application
    Filed: August 11, 2005
    Publication date: December 1, 2005
    Inventors: Per Sterte, Lubomira Tosheva, Valentin Valtchev
  • Publication number: 20050209092
    Abstract: There is provided macrostructures of porous inorganic material which can have controlled size, shape, and/or porosity and a process for preparing the macrostructures. The macrostructures comprise a three-dimension network of particles of porous inorganic materials. The process for preparing the macrostructures involves forming an admixture containing a porous organic ion exchanger and a synthesis mixture capable of forming the porous inorganic material and then converting the synthesis mixture to the porous inorganic material. After formation of the composite material, the porous organic ion exchanger can be removed from the composite material to obtain the macrostructures.
    Type: Application
    Filed: May 13, 2005
    Publication date: September 22, 2005
    Inventors: Per Sterte, Lubomira Tosheva, Valentin Valtchev, Svetlana Mintova