Patents by Inventor Christa Luhmann

Christa Luhmann 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 composition, process for its preparation and its use
    Patent number: 4851460
    Abstract: An aqueous coating composition is described, containing, as binder, a mixture of (A) 50 to 95% by weight of a reaction product of a carboxy functional polycondensate containing epoxy groups, at least one copolymerisable o,-olefinically unsaturated monomer and conventional auxiliary agents, and (B) 50 to 5% by weight of a polyurethane dispersion, optionally together with a grinding resin. The process for the preparation of the aqueous coating compound and its use for the formation of coatings are also described.
    Type: Grant
    Filed: August 18, 1987
    Date of Patent: July 25, 1989
    Assignee: Herberts Gesellschaft mit Beschrankter Haftung
    Inventors: Dieter Stranghoner, Hans-Peter Patzschke, Christa Luhmann