Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6843976 | Reduction of zinc oxide from complex sulfide concentrates using chloride processing | Carole Allen, Peter Kondos, Gezinus Van Weert | 2005-01-18 |
| 6726889 | Production of zinc oxide from acid soluble ore using precipitation method | Yeonuk Choi, Joo Kim, Anna-Maria Giove, Ramachandra M R Rao, James A. Finch | 2004-04-27 |
| 6395242 | Production of zinc oxide from complex sulfide concentrates using chloride processing | Carole Allen, Peter Kondos, Gezinus Van Weert, Anthonie Van Sandwijk | 2002-05-28 |