Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4510028 | Process for recovering zinc from zinc ferrite material | Donald R. Weir | 1985-04-09 |
| 4505744 | Recovery of zinc from zinc containing sulphidic material | Donald R. Weir, Ian M. Masters | 1985-03-19 |
| 4379037 | Removal of manganese and chloride ions from aqueous acidic zinc sulphate solutions | Verner B. Sefton, Nicolaus Zubryckyj | 1983-04-05 |
| 4290866 | Removal of manganese ions from zinc and manganese containing solutions | Verner B. Sefton, Nicolaus Zubryckyj | 1981-09-22 |