Patents by Inventor Margarete Herbski

Margarete Herbski 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).

  • Multilayer pigments based on coated metal platelets
    Publication number: 20040180010
    Abstract: The present invention relates to multilayer pigments based on platelet-shaped metal substrates coated with two or more metal oxide layers by a one-pot process in an exclusively aqueous medium. The invention further relates to the use of the multilayer pigments in paints, varnishes, printing inks, including security printing inks, plastics, ceramic materials and cosmetic and for the laser formulations marking of plastics.
    Type: Application
    Filed: March 30, 2004
    Publication date: September 16, 2004
    Inventors: Stephanie Andes, Sabine George, Margarete Herbski, Peter Reynders, Reiner Vogt, Johann Dietz, Helge Kniess, Elke Steudel
  • Multilayer pigments based on coated metal platelets
    Patent number: 6776835
    Abstract: The present invention relates to multilayer pigments based on platelet-shaped metal substrates coated with two or more metal oxide layers by a one-pot process in an exclusively aqueous medium. The invention further relates to the use of the multilayer pigments in paints, varnishes, printing inks, including security printing inks, plastics, ceramic materials and cosmetic and for the laser formulations marking of plastics.
    Type: Grant
    Filed: June 4, 2003
    Date of Patent: August 17, 2004
    Assignee: Merck Patent Gesellschaft MIT Beschrankter Haftung
    Inventors: Stephanie Andes, Sabine George, Margarete Herbski, Peter Reynders, Reiner Vogt, Johann Dietz, Helge Kniess, Elke Steudel
  • Multilayer pigments based on coated metal platelets
    Publication number: 20030209169
    Abstract: The present invention relates to multilayer pigments based on platelet-shaped metal substrates coated with two or more metal oxide layers by a one-pot process in an exclusively aqueous medium. The invention further relates to the use of the multilayer pigments in paints, varnishes, printing inks, including security printing inks, plastics, ceramic materials and cosmetic and for the laser formulations marking of plastics.
    Type: Application
    Filed: June 4, 2003
    Publication date: November 13, 2003
    Applicant: MERCK PATENT GESELLSCHAFT MIT BESCHRANKTER HAFTUNG
    Inventors: Stephanie Andes, Sabine George, Margarete Herbski, Peter Reynders, Reiner Vogt, Johann Dietz, Helge Kniess, Elke Steudel
  • Non-lustrous pigments
    Patent number: 6019831
    Abstract: The present invention relates to non-lustrous iron oxide-containing color pigments based on dry-milled inorganic plateletlike substrates having a particle size of <60 .mu.m, characterized in that the iron oxide compound is yellow FeO(OH) and/or Fe.sub.2 O.sub.3.
    Type: Grant
    Filed: February 5, 1997
    Date of Patent: February 1, 2000
    Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Christoph Schmidt, Claudia Seibel, Margarete Herbski, Ralf Emmert, Klaus Ambrosius
  • Surface-modified pigments
    Patent number: 5468289
    Abstract: The present invention relates to surface-modified pigments based on platelet-like substrates which, for improving the settling and redispersion behavior, have been recoated with a mixture comprising two metal oxides selected from the group consisting of silica, alumina and zirconium dioxide.
    Type: Grant
    Filed: September 30, 1994
    Date of Patent: November 21, 1995
    Assignee: Merck Patent Gesellschaft Mit Beschrankter Haftung
    Inventors: Gerhard Herget, Margarete Herbski, Karl Osterried