Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5407650 | Process for purifying a technical iron chloride solution by selective precipitation | Achim Hartmann, Dieter Schinkitz | 1995-04-18 |
| 4533537 | Process of producing sulfuric acid | Heinz Dittmar, Manfred Beckmann, Karl-Heinz Dorr, Ulrich Sander | 1985-08-06 |