Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5919318 | Iron phosphating using substituted monocarboxylic acids | Melita Krause, Bernd Mayer, Thomas Molz, Annette Willer | 1999-07-06 |
| 5792283 | Nickel-free phosphating process | Wolf-Achim Roland, Karl-Heinz Gottwald, Jan-Willem Brouwer, Bernd Mayer | 1998-08-11 |
| 5503733 | Process for phosphating galvanized steel surfaces | Horst-Dieter Speckmann, Reinhard Seidel, Gerard Veldman | 1996-04-02 |
| 5401381 | Process for phosphating metallic surfaces | Reinhard Seidel, Horst-Dieter Speckmann, Gerard Veldman, Raschad Mady | 1995-03-28 |
| 5391240 | Process for the passivating post-treatment of phosphatized metal surfaces | Reinhard Seidel, Karl-Heinz Gottwald | 1995-02-21 |
| 5112414 | Titanium free composition and process for activating metal surfaces prior to zinc phosphating | Helmut Endres, Peter Christophliemk, Wolf-Achim Roland | 1992-05-12 |
| 5039362 | Titanium free composition and process for activating metal surfaces prior to zinc phosphating | Helmut Endres, Peter Christophliemk, Wolf-Achim Roland | 1991-08-13 |
| 4957568 | Composition and process for activating metal surfaces prior to zinc phosphating and process for making said composition | Helmut Endres, Peter Christophliemk, Wolf-Achim Roland, Joerg Riesop | 1990-09-18 |
| 4655960 | Foam inhibitors for aqueous synthetic resin compositions | Juan C. Wuhrmann, Heinz Mueller, Adolf Asbeck, Jochen Heidrich | 1987-04-07 |
| 4655961 | Foam inhibitors for aqueous dispersions and solutions of synthetic resins | Juan C. Wuhrmann, Heinz Mueller, Adolf Asbeck, Jochen Heidrich | 1987-04-07 |
| 4599189 | Paraffin-containing defoaming compositions and detergent compositions containing same | Juan C. Wuhrmann, Heinz Mueller, Klaus Schumann, Theodor Altenschoepfer | 1986-07-08 |