Patents by Inventor Olivier Favrat

Olivier Favrat 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).

  • Publication number: 20230219050
    Abstract: The present invention relates to a method for preparing a dispersed suspension of nanoparticles called “raspberry nanoparticles” having a diameter of less than or equal to 130 nm, the raspberry nanoparticles being optionally functionalised with a hydrophobic organic molecule. The present invention also relates to a suspension which comprises the raspberry nanoparticles and can be produced by the method and to the use thereof for making a surface superhydrophobic or superhydrophilic, depending on whether the nanoparticles are functionalised with a hydrophobic organic molecule. Finally, the present invention relates to a method for covering the surface using a suspension according to the invention in one single step.
    Type: Application
    Filed: October 5, 2020
    Publication date: July 13, 2023
    Applicant: Surfactis Technologies
    Inventors: Olivier Favrat, David Portet
  • Publication number: 20220403222
    Abstract: The present invention relates to an article having a surface coated with a nanostructured temporary super-hydrophobic film having a static contact angle with water of at least 140°, preferably exhibiting multiple length scales of roughness and comprising nanoparticles functionalized with a hydrophobic agent, wherein the functionalization of the nanoparticles with the hydrophobic agent has been performed before said nanostructured temporary super-hydrophobic film is coated on said surface. The surface of the article exhibits a static contact angle with water of at least 60° before being coated with the nanostructured temporary super-hydrophobic film. The treatment according to the invention can be used to provide an antirain function to optical articles having a hydrophobic surface.
    Type: Application
    Filed: October 5, 2020
    Publication date: December 22, 2022
    Inventors: Mathieu FEUILLADE, Camille MERIDIANO, David PORTET, Olivier FAVRAT
  • Publication number: 20220348495
    Abstract: The present invention relates to an article having a surface coated with a nanostructured temporary super-hydrophobic film having a static contact angle with water of at least 140°, and comprising nanoparticles functionalized with a hydrophobic agent, wherein the functionalization of the nanoparticles with the hydrophobic agent has been performed before said nanostructured temporary super-hydrophobic film is coated on said surface. The surface of the article exhibits a static contact angle with water of less than 60° before being coated with the nanostructured temporary super-hydrophobic film. The treatment according to the invention can be used to provide an antirain function to optical articles having a hydrophilic surface.
    Type: Application
    Filed: October 5, 2020
    Publication date: November 3, 2022
    Inventors: Mathieu FEUILLADE, Camille MERIDIANO, Isabelle BONNET, David PORTET, Olivier FAVRAT
  • 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