Patents by Inventor Gerald Karn

Gerald Karn 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).

  • Glass-ceramic discs for use in pigments
    Patent number: 8568526
    Abstract: The present invention relates to a glass composition comprising crystalline phases, and to glass flakes produced therefrom. These glass flakes can be used as base substrate for effect pigments. The glass flakes can furthermore be used in paints, coatings, printing inks, plastics and in cosmetic formulations. The glass flakes are converted into glass-ceramics, and are present in one of the following composition ranges I or II in % by weight: I: 40-50 SiO2, 10-20 B2O3, 10-20 Na2O, 15-30 TiO2; II: 10-60 SiO2, 5-30 B2O3, 5-40 TiO2, 2-20 Nb2O5, 2-20 Fe2O3, 5-40 Na2O+K2O+CaO+SrO+BaO.
    Type: Grant
    Filed: May 15, 2009
    Date of Patent: October 29, 2013
    Assignee: Merck Patent GmbH
    Inventors: Reinhold Rueger, Anke Geisen, Gerald Karn
  • GLASS-CERAMIC DISCS FOR USE IN PIGMENTS
    Publication number: 20110129674
    Abstract: The present invention relates to a glass composition comprising crystalline phases, and to glass flakes produced therefrom. These glass flakes can be used as base substrate for effect pigments. The glass flakes can furthermore be used in paints, coatings, printing inks, plastics and in cosmetic formulations. The glass flakes are converted into glass-ceramics, and are present in one of the following composition ranges I or II in % by weight: I: 40-50 SiO2, 10-20 B2O3, 10-20 Na2O, 15-30 TiO2; II: 10-60 SiO2, 5-30 B2O3, 5-40 TiO2, 2-20 Nb2O5, 2-20 Fe2O3, 5-40 Na2O+K2O+CaO+SrO+BaO.
    Type: Application
    Filed: May 15, 2009
    Publication date: June 2, 2011
    Applicant: MERCK PATENT GESELLSCHAFT MIT BESCHRANKTER HAFTUNG
    Inventors: Reinhold Rueger, Anke Geisen, Gerald Karn