Patents by Inventor Gisela Lenz

Gisela Lenz 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).

  • Inorganic spherical absorption pigments
    Patent number: 6866710
    Abstract: The present invention relates to inorganic spherical absorption pigments which have a bimodal particle-size distribution, at least one color-providing layer and a final SiO2 layer, and to the use thereof in paints, coatings, printing inks, security printing inks, plastics, ceramic materials, glasses, as tracers, in cosmetic formulations and for the preparation of pigment preparations and dry preparations.
    Type: Grant
    Filed: December 17, 2003
    Date of Patent: March 15, 2005
    Assignee: Merck Patent GmbH
    Inventors: Lilia Heider, Martin Knapp, Gisela Lenz, Norbert Rick
  • Inorganic spherical absorption pigments
    Publication number: 20040177789
    Abstract: The present invention relates to inorganic spherical absorption pigments which have a bimodal particle-size distribution, at least one color-providing layer and a final SiO2 layer, and to the use thereof in paints, coatings, printing inks, security printing inks, plastics, ceramic materials, glasses, as tracers, in cosmetic formulations and for the preparation of pigment preparations and dry preparations.
    Type: Application
    Filed: December 17, 2003
    Publication date: September 16, 2004
    Inventors: Lilia Heider, Martin Knapp, Gisela Lenz, Norbert Rick
  • Cosmetic formulations with carrier-free iron oxide platelets
    Patent number: 4828826
    Abstract: A cosmetic formulation comprising a cosmetically compatible adjuvant and particles of at least one colored pigment is improved by using as the colored pigment a synthetic platelet-shaped iron oxide pigment. The resulting pigment enables improved skin feel in cosmetic preparations.
    Type: Grant
    Filed: October 22, 1987
    Date of Patent: May 9, 1989
    Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Klaus D. Franz, Andrea Griessmann, Gisela Lenz, Gernot Moschl