Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4666132 | Method and apparatus for the pyrometallurgical treatment of fine grained solids to produce molten products | Gerhard Melcher, Friedrich Megerle | 1987-05-19 |
| 4566903 | Method for the pyrometallurgical treatment of fine grained solids to produce molten products | Gerhard Melcher, Friedrich Megerle | 1986-01-28 |
| 4493732 | Method for implementing pyro-metallurgical processes | Gerhard Melcher | 1985-01-15 |
| 4210441 | Method for the continuous or discontinuous treatment of molten slag, particularly with contents of heavy metal oxides, for the recovery of portions contained therein of valuable metals or their combinations, respectively | — | 1980-07-01 |