Patents by Inventor Otto Kuhnert

Otto Kuhnert 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).

  • Organically modified silicic acids and silicates for delustering lacquers
    Patent number: 4038224
    Abstract: Modified silicic acids, gels, and silicates are produced by impregnation with a wax or a thermoplastic material, such as polyethylene. The silicic acids, silica gels, or silicates can be impregnated either as they are being formed or after they have formed by adding an aqueous suspension or dispersion of wax thermoplastic material to the silicic acids, gels or silicates. The mixture is then filtered, washed, dried, and finely ground. The organically modified silicic acids, gels, and silicates are useful as delustering agents in lacquer systems.
    Type: Grant
    Filed: April 5, 1976
    Date of Patent: July 26, 1977
    Assignee: Deutsche Gold- und Silber-Scheideanstalt vormals Roessler
    Inventors: Edith Eisenmenger, Otto Kuhnert, Robert Kuhlmann, Peter Nauroth, Gunter Turk