Patents by Inventor August Kanpp

August Kanpp 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).

  • Nacreous pigments
    Patent number: 4867793
    Abstract: Platelet-shaped colored pigments in which a platelet-shaped substrate is provided with a compact coating containing iron(II) oxide, which coating has a high gloss and, depending on the layer thickness, shows the interference color of thin platelets, are described.
    Type: Grant
    Filed: May 22, 1987
    Date of Patent: September 19, 1989
    Assignee: Merck Patent Gesellschaft mit Beschrankter Haftung
    Inventors: Klaus D. Franz, Kalus Ambrosius, August Kanpp, Hans D. Brucker