| 8568522 |
Method of passivating metallic surfaces by means of copolymers having phosphoric acid and/or phosphonic acid groups |
Frank Klippel, Gunnar Schornick, Dietrich Fehringer, Thomas Heidenfelder, Helmut Witteler +1 more |
2013-10-29 |
| 8563128 |
Preparation for and method of applying corrosion control coats |
Guido Vandermeulen, Konrad Roschmann, Gerhard Fischer, Helmut Witteler, Monica Fernandez Gonzalez |
2013-10-22 |
| 8420219 |
Method for the application of corrosion-resistant layers to metallic surfaces |
Guido Vandermeulen, Markus Hickl, Michael Dornbusch, Monica Fernandez Gonzalez, Konrad Roschmann +1 more |
2013-04-16 |
| 8241745 |
Essentially chromium-free method for passivating metallic surfaces consisting of Zn, Zn alloys, Al or Al alloys |
Frank Dietsche, Frank Klippel, Matthias Kluglein |
2012-08-14 |
| 7905964 |
Method for the passivation of metal surfaces with compositions comprising polymers with acid groups and waxes |
Helmut Witteler, Walter Bertkau, Thomas Heidenfelder |
2011-03-15 |
| 7749337 |
Method for the passivation of metal surfaces with polymers containing acid groups |
Helmut Witteler, Walter Bertkau, Thomas Heidenfelder, Jens Haas, Frank Klippel +1 more |
2010-07-06 |
