Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5667556 | Method of reprocessing zinc- and iron oxide-containing residual material | Andreas Orth, Peter Weber, Uwe Harter | 1997-09-16 |
| 5244551 | Process of regenerating waste pickle which contains metal salts and acids | Volker Brucken, Albert Kaune, Manfred Potzschke | 1993-09-14 |
| 5030415 | Structural part made of ferritic chromium-molybdenum steel which is resistant to concentrated sulfuric acid | Karl-Heinz Dorr, Hermann Muller, Ulrich Sander, Wolfram Schalk | 1991-07-09 |
| 4906437 | Corrosion resistant hot and cold forming parts of Ni-Cr-Mo alloy and method of making same | Ulrich Heubner, Michael Köhler, Manfred Rockel | 1990-03-06 |
| 4876065 | Corrosion-resisting Fe-Ni-Cr alloy | Manfred Rockel, Michael Köhler, Ulrich Heubner, Rolf Kirchheiner | 1989-10-24 |