Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4582481 | Process of drying sulfide ores in direct contact with hot drying gases | Karl-Heinz Dorr, Ulrich Sander, Alfons Schulte | 1986-04-15 |
| 4266971 | Continuous process of converting non-ferrous metal sulfide concentrates | Werner Schwartz, Peter Fischer | 1981-05-12 |