Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4732606 | Process of treating aluminum-containing fused slag | Klaus Kobele, Gerhard Gotz, Ernst D. Rode, Friedrich Berger | 1988-03-22 |
| 4568353 | Process of producing coarse, pure potassium chloride crystals | Horst Hartmann, Walter Bauer | 1986-02-04 |
| 4533537 | Process of producing sulfuric acid | Heinz Dittmar, Karl-Heinz Dorr, Ulrich Rothe, Ulrich Sander | 1985-08-06 |