Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8568522 | Method of passivating metallic surfaces by means of copolymers having phosphoric acid and/or phosphonic acid groups | Alexander Gothlich, Gunnar Schornick, Dietrich Fehringer, Thomas Heidenfelder, Helmut Witteler +1 more | 2013-10-29 |
| 8420174 | Polymer composition for corrosion protection | Alexander Goethlich, Gunnar Schornick, Guido Vandermeulen, Helmut Witteler, Thomas Heidenfelder +4 more | 2013-04-16 |
| 8394208 | Carboxylate-containing polymers for metal surface treatment | Frank Dietsche, Helmut Witteler, Matthias Kluglein | 2013-03-12 |
| 8268404 | Method for applying corrosion protection coatings to metal surfaces | Guido Vandermeulen, Konrad Roschmann, Stephan Amthor, Marc Schroeder, Alexsandro Berger | 2012-09-18 |
| 8241745 | Essentially chromium-free method for passivating metallic surfaces consisting of Zn, Zn alloys, Al or Al alloys | Frank Dietsche, Matthias Kluglein, Alexander Gothlich | 2012-08-14 |
| 8002119 | Control of the thickening of silicate-containing aqueous systems | Karl-Heinz Buechner, Stephan Nied, Alexander Goethlich, Gunnar Schornick | 2011-08-23 |
| 7879158 | Nitrogenous polymers for metal surface treatment | Frank Dietsche, Helmut Witteler, Matthias Kluglein | 2011-02-01 |
| 7749337 | Method for the passivation of metal surfaces with polymers containing acid groups | Helmut Witteler, Walter Bertkau, Thomas Heidenfelder, Alexander Gothlich, Jens Haas +1 more | 2010-07-06 |
| 7655279 | Carboxylate-containing polymers for metal surface treatment | Frank Dietsche, Helmut Witteler, Matthias Kluglein | 2010-02-02 |