Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4639269 | Method and apparatus for the reducing treatment of molten metals and/or slags thereof | Michael Gamroth, Gerhard Melcher, Friedrich Megerle | 1987-01-27 |
| 4491470 | Method for separating non-ferrous metals from ferruginous secondary substances | Chatty Rao | 1985-01-01 |
| 4477323 | Method for recovering zinc from a sulfidic zinc source | Mohammed Esna-Ashari | 1984-10-16 |
| 4447261 | Method for separating non-ferrous metals from iron-containing materials | Chatty Rao | 1984-05-08 |