Patents by Inventor Stéphane Bertaux

Stéphane Bertaux 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).

  • Pearlescent pigments
    Patent number: 6719837
    Abstract: The present invention relates to pearlescent pigments based on substrates coated with one or more layers of nitrides or oxynitrides to a method for the production of such pigments and their use in plastics, paints, coatings, powder coatings, inks, printing inks, glasses, ceramic products, agriculture foils, for lasermarking of papers and plastics, security applications and in cosmetic formulations.
    Type: Grant
    Filed: January 31, 2003
    Date of Patent: April 13, 2004
    Assignee: Merck Patent Gesellschaft mit beschränkter Haftung
    Inventors: Stéphane Bertaux, Peter Reynders, Jens-Uwe Wichmann, Eberhard Schweda