Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5174817 | Process for the calcination of filter cakes with high solids contents being partly pre-dried in a directly heated rotary kiln | Bernd Holle, Rolf Braun, Hilmar Rieck, Jurgen Kischkewitz, Gerhard Wiederhoft | 1992-12-29 |