Patents by Inventor Patrick GUENOUN

Patrick GUENOUN 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).

  • Process for manufacturing omniphobic cosmetic pigments
    Patent number: 11040000
    Abstract: For the cosmetic field, omniphobic cosmetic pigments under the form of a core shell structure: the core is or includes of a metal oxide on which is adsorbed poly(?-(1?4)-D-glucosamine) chains; the chains being acetylated, or partially or totally deacetylated. Also, the process for manufacturing the omniphobic cosmetic pigments, including: (i) preparing an acidic aqueous solution including metal oxide particles and a poly (?-(1?4)-D-glucosamine), the poly (?-(1?4)-D-glucosamine) being acetylated, or partially or totally deacetylated; and (ii) increasing the pH until 12, of the solution obtained at step (i) in order to obtain the adsorption of said poly (?-(1?4)-D-glucosamine on the metal oxide particles and the precipitation of the resulting metal oxide particles coated with the poly (?-(1?4)-D-glucosamine.
    Type: Grant
    Filed: November 15, 2019
    Date of Patent: June 22, 2021
    Assignees: COMMISSARIAT À L'ÉNERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVES (CEA), CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, MIYOSHI EUROPE S.A.S.
    Inventors: Patrick Guenoun, Christophe Fajolles, Tetsuya Takahashi, Stephane Nicolas, Pauline Bosmet, Sébastien Gougeon
  • PROCESS FOR MANUFACTURING OMNIPHOBIC COSMETIC PIGMENTS
    Publication number: 20200155441
    Abstract: For the cosmetic field, omniphobic cosmetic pigments under the form of a core shell structure: the core is or includes of a metal oxide on which is adsorbed poly(?-(1?4)-D-glucosamine) chains; the chains being acetylated, or partially or totally deacetylated. Also, the process for manufacturing the omniphobic cosmetic pigments, including: (i) preparing an acidic aqueous solution including metal oxide particles and a poly (?-(1?4)-D-glucosamine), the poly (?-(1?4)-D-glucosamine) being acetylated, or partially or totally deacetylated; and (ii) increasing the pH until 12, of the solution obtained at step (i) in order to obtain the adsorption of said poly (?-(1?4)-D-glucosamine on the metal oxide particles and the precipitation of the resulting metal oxide particles coated with the poly (?-(1?4)-D-glucosamine.
    Type: Application
    Filed: November 15, 2019
    Publication date: May 21, 2020
    Applicants: COMMISSARIAT À L'ÉNERGIE ATOMIQUE ET AUX ÉNERGIES ALTERNATIVES (CEA), CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, MIYOSHI EUROPE S.A.S.
    Inventors: Patrick GUENOUN, Christophe FAJOLLES, Tetsuya TAKAHASHI, Stephane NICOLAS, Pauline BOSMET, Sébastien GOUGEON