Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6241958 | Process for preparing sulfate-containing basic solutions of polyaluminumchloride | Gerhard Haake, Frank Haupt | 2001-06-05 |
| 4244928 | Process for the production of pure aluminum oxide | Siegfried Ziegenbalg, Gerhard Haake | 1981-01-13 |