Patents by Inventor Annick Colette

Annick Colette 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 the preparation of a melanic pigment of small particle size and its use in cosmetics
    Patent number: 5776241
    Abstract: Process for the preparation of a melanic pigment of small particle size and its use in cosmetics. The subject of the present invention is a process for the preparation of a melanic pigment of very small particle size in which 100% of the particles have a particle size smaller than 1.mu.m, consisting in dissolving a melanin of natural and/or synthetic origin in an aqueous medium containing at least one alkalifying agent and/or at least one sequestering agent, and in precipitating the melanin thus dissolved by addition of at least one alkaline-earth metal salt. Another subject of the invention is the use of this pigment in compositions for cosmetic treatments and for dyeing hair.
    Type: Grant
    Filed: March 10, 1997
    Date of Patent: July 7, 1998
    Assignee: L'Oreal
    Inventors: Paolo Giacomoni, Laurent Marrot, Myriam Mellul, Annick Colette