Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8394208 | Carboxylate-containing polymers for metal surface treatment | Frank Dietsche, Helmut Witteler, Frank Klippel | 2013-03-12 |
| 8241745 | Essentially chromium-free method for passivating metallic surfaces consisting of Zn, Zn alloys, Al or Al alloys | Frank Dietsche, Frank Klippel, Alexander Gothlich | 2012-08-14 |
| 7879158 | Nitrogenous polymers for metal surface treatment | Frank Dietsche, Helmut Witteler, Frank Klippel | 2011-02-01 |
| 7655279 | Carboxylate-containing polymers for metal surface treatment | Frank Dietsche, Helmut Witteler, Frank Klippel | 2010-02-02 |