Patents by Inventor Nicolas Lefevre

Nicolas Lefevre 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: 10668501
    Abstract: The present invention relates to a process for texturing surfaces providing the latter with superhydrophobic, superoleophobic, superhydrophilic or even superoleophilic properties. This process comprises i) a step of texturing the surface (via the deposition of nanoparticles of different sizes); ii) a step of curing the surface thus textured (with a curing agent); and, optionally, iii) a step of modifying the properties of the surface with perfluorinated (and therefore hydrophobic) molecules. This process is suitable, inter alia, for treating transparent and/or heat-sensitive materials and surfaces. Specifically, none of the steps of the process use a temperature higher than 100° C. Thus, the process of the invention is particularly suitable for treating transparent surfaces composed of non-mineral materials, such as polycarbonate for example, as it will affect neither their transparency nor their optical properties.
    Type: Grant
    Filed: May 20, 2015
    Date of Patent: June 2, 2020
    Assignees: Centre National de la Recherche Scientifique (CNRS), Surfactis Technologies
    Inventors: David Portet, Nicolas Lefevre, Stéphane Bejanin, Abdelhafed Taleb, Dorra Ben Jazia Dallel, Olivier Favrat
  • Publication number: 20170120294
    Abstract: The present invention relates to a process for texturing surfaces providing the latter with superhydrophobic, superoleophobic, superhydrophilic or even superoleophilic properties. This process comprises i) a step of texturing the surface (via the deposition of nanoparticles of different sizes); ii) a step of curing the surface thus textured (with a curing agent); and, optionally, a step of modifying the properties of the surface with perfluorinated (and therefore hydrophobic) molecules. This process is suitable, inter alia, for treating transparent and/or heat-sensitive materials and surfaces. Specifically, none of the steps of the process use a temperature higher than 100° C. Thus, the process of the invention is particularly suitable for treating transparent surfaces composed of non-mineral materials, such as polycarbonate for example, as it wilt affect neither their transparency nor their optical properties.
    Type: Application
    Filed: May 20, 2015
    Publication date: May 4, 2017
    Applicants: Centre National de la Recherche Scientifique (CNRS), Surfactis Technologies
    Inventors: David Portet, Nicolas Lefevre, Stéphane Bejanin, Abdelhafed Taleb, Dorra Ben Jazia Dallel, Olivier Favrat
  • Publication number: 20140012005
    Abstract: The present invention relates to a process for preparing chiral amino acids with excellent enantiomeric excesses.
    Type: Application
    Filed: December 22, 2011
    Publication date: January 9, 2014
    Applicant: Diverchim
    Inventors: Sylvain Darses, Nicolas Lefevre, Benoit Folleas, Jean-Louis Brayer
  • Patent number: 7934353
    Abstract: Panel including, in succession, a first rigid board forming the back of the panel, a first thermally insulating layer borne by the backboard, an impervious covering covering the first thermally insulating layer, a second thermally insulating layer which partially covers the impervious covering and a second rigid board covering the second thermally insulating layer, characterized in that it includes a film which covers at least part of the impervious covering which is not covered by the second thermally insulating layer, the film including at least one protective portion and at least one spew portion adjacent to the protective portion, the protective portion and the spew portion being able to be detached from the impervious covering independently of one another.
    Type: Grant
    Filed: June 13, 2007
    Date of Patent: May 3, 2011
    Assignee: Gaztransport et Technigaz
    Inventors: Jacques Dhellemmes, Nicolas Lefevre, Sophie Preato-Pavret De La Rochefordiere, Christophe Huon De Kermadec
  • Publication number: 20080053200
    Abstract: Method for testing the sealing of a test specimen (21) comprising a sealing film and two fibrous reinforcing layers, one on each side of the said sealing film, the said method comprising the steps of: connecting the said test specimen to a test bench (22), conducting a first test of behaviour under pressure, subjecting the said test specimen to at least a first thermal shock, and conducting at least a second test of behaviour under pressure, characterized in that the said method comprises at least the steps of: removing the said test specimen from the said test bench after the said first test of behaviour under pressure, and subjecting the said test specimen to the said first thermal shock remotely from the said test bench, and refixing the said test specimen to the said test bench to conduct the said second test of behaviour under pressure.
    Type: Application
    Filed: July 17, 2007
    Publication date: March 6, 2008
    Applicant: GAZTRANSPORT ET TECHNIGAZ
    Inventors: Jacques Dhellemmes, Nicolas Lefevre, Sophie Preato-Pavret De La Rochefordiere, Christophe Huon De Kermadec
  • Publication number: 20080000172
    Abstract: Panel (1) comprising, in succession, a first rigid board forming the back of the panel, a first thermally insulating layer (3) borne by the said backboard, an impervious covering (4) covering the said first thermally insulating layer, a second thermally insulating layer (5) which partially covers the said impervious covering and a second rigid board (6) covering the said second thermally insulating layer, characterized in that it comprises a film (8) which covers at least part of the said impervious covering which is not covered by the said second thermally insulating layer, the said film comprising at least one protective portion (9) and at least one spew portion (11) adjacent to the said protective portion, the said protective portion and the said spew portion being able to be detached from the said impervious covering independently of one another.
    Type: Application
    Filed: June 13, 2007
    Publication date: January 3, 2008
    Applicant: GAZTRANSPORT ET TECHNIGAZ
    Inventors: Jacques Dhellemmes, Nicolas Lefevre, Sophie Preato-Pavret De La Rochefordiere, Christophe Huon De Kermadec