Patents by Inventor Olivier GUERARD

Olivier GUERARD 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 DYEING KERATIN FIBERS USING A DIRECT DYE AND A SACCHARINATE SALT AND COMPOSITION COMPRISING THEM
    Publication number: 20230346669
    Abstract: The present invention relates to a process for dyeing keratin fibers using a) one or more direct dyes and b) one or more particular saccharinate salts.
    Type: Application
    Filed: June 18, 2021
    Publication date: November 2, 2023
    Inventors: Olivier GUERARD, Stéphane SABELLE
  • Process for dyeing keratin materials using a direct dye and an aliphatic ammonium salt, and composition comprising same
    Patent number: 11672747
    Abstract: The present invention relates to a cosmetic process for treating keratin materials, in particular keratin fibers, preferably human keratin fibers such as the hair, using a) one or more direct dyes which are preferably neutral and b) one or more particular aliphatic ammonium salts, and to a composition comprising ingredients a) and b). The cosmetic process for treating keratin materials of the invention makes it possible to obtain a good color build-up up and, furthermore, the colors are vivid and chromatic.
    Type: Grant
    Filed: December 17, 2019
    Date of Patent: June 13, 2023
    Assignee: L'OREAL
    Inventors: Stéphane Sabelle, Olivier Guerard
  • Triaromatic azomethine direct dyes, dye composition comprising at least one such dye, method of implementation and use
    Patent number: 9554977
    Abstract: The present invention relates to azomethine-type direct dyes having a triaromatic unit of formula (I) below: and also the use thereof for dyeing keratin fibers, in particular human keratin fibers such as the hair. The invention also relates to a composition for dyeing keratin fibers, comprising, in a medium suitable for dyeing, such direct dyes. Another subject of the present invention is a method for dyeing keratin fibers using said dye composition. Finally, the present invention also relates to precursors of these direct dyes.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: January 31, 2017
    Assignee: L'OREAL
    Inventors: Stephane Sabelle, Madeleine Leduc, Olivier Guerard
  • TRIAROMATIC AZOMETHINE DIRECT DYES, DYE COMPOSITION COMPRISING AT LEAST ONE SUCH DYE, METHOD OF IMPLEMENTATION AND USE
    Publication number: 20150320660
    Abstract: The present invention relates to azomethine-type direct dyes having a triaromatic unit of formula (I) below: and also the use thereof for dyeing keratin fibres, in particular human keratin fibres such as the hair. The invention also relates to a composition for dyeing keratin fibres, comprising, in a medium suitable for dyeing, such direct dyes. Another subject of the present invention is a method for dyeing keratin fibres using said dye composition. Finally, the present invention also relates to precursors of these direct dyes.
    Type: Application
    Filed: December 13, 2012
    Publication date: November 12, 2015
    Inventors: Stephane SABELLE, Madeleine LEDUC, Olivier GUERARD