Patents by Inventor Knut Graff

Knut Graff 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).

  • Aqueous coating compositions, a process for their preparation and method of using the same
    Patent number: 4880867
    Abstract: An aqueous coating composition is provided which comprises a film forming material based on water dilutable binders which are comprised of a mixture of (A) 90 to 40% by weight of hydroxyl group-containing polymer resin; (B) 10 to 60% by weight of polyurethane dispersion and (C) pigments; as well as optionally conventional solvents, auxiliary agents, and additives. The process for the preparation of the coating composition and a method for the application of the coating composition are also described.
    Type: Grant
    Filed: August 18, 1987
    Date of Patent: November 14, 1989
    Assignee: 501 Herberts Gesellschaft mit Beschrankter
    Inventors: Armin Gobel, Knut Graff, Hans-Ulrich Meier, Hans-Peter Patzschke