Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5380354 | Recovery of metals from sulphidic material | Michael E. Chalkley, Ian M. Masters | 1995-01-10 |
| 4832925 | Recovery of zinc from zinc-containing sulphidic material | Donald R. Weir, Ian M. Masters | 1989-05-23 |
| 4545963 | Process for separately recovering zinc and lead values from zinc and lead containing sulphidic ore | Donald R. Weir, Ian M. Masters, Michael E. Chalkley | 1985-10-08 |