Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6241958 | Process for preparing sulfate-containing basic solutions of polyaluminumchloride | Gunter Geiler, Frank Haupt | 2001-06-05 |
| 4244928 | Process for the production of pure aluminum oxide | Siegfried Ziegenbalg, Gunter Geiler | 1981-01-13 |
| 4224287 | Process for the preparation of pure aluminum oxide | Siegfried Ziegenbalg, Gerhard Fischer, Rudolf Siebert | 1980-09-23 |