Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6843976 | Reduction of zinc oxide from complex sulfide concentrates using chloride processing | Serge Payant, Peter Kondos, Gezinus Van Weert | 2005-01-18 |
| 6395242 | Production of zinc oxide from complex sulfide concentrates using chloride processing | Peter Kondos, Serge Payant, Gezinus Van Weert, Anthonie Van Sandwijk | 2002-05-28 |
| 5200042 | Process to recover pure copper during purification of zinc sulfate solution | George Houlachi, Francis Belanger | 1993-04-06 |