Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12286686 | Co-processing of copper sulphide concentrate with nickel laterite ore | Jan Tjeerd Smit, Preston Carl Holloway, Alain Tshilombo, Nigel Edwin Tuffrey | 2025-04-29 |
| 10544482 | Recovery of copper from arsenic-containing process feed | Kelvin Richard Buban, Preston Carl Holloway | 2020-01-28 |
| 8147781 | Recovering metal values from a metalliferrous material | Preston Carl Holloway, Eugene William Yuzda | 2012-04-03 |
| 7387767 | Recovery of nickel, cobalt, iron, silica, zinc and copper from laterite ore by sulfuric acid leaching | Finlay Campbell, Ian M. Masters, Lyle Trytten | 2008-06-17 |
| 5770170 | Recovery of zinc from sulphidic concentrates | Donald K. Kofluk | 1998-06-23 |
| 5730776 | Hydrometallurgical process for the extraction of copper from sulphidic concentrates | Donald K. Kofluk | 1998-03-24 |
| 5711929 | Purification of elemental sulphur | Michael E. Chalkley, Manher M. Makwana, Ian M. Masters, John Stiksma | 1998-01-27 |
| 5651947 | Recovery of zinc from sulphidic concentrates | Donald K. Kofluk | 1997-07-29 |
| 5403571 | Purification of elemental sulphur | Michael E. Chalkley, Manher M. Makwana, Ian M. Masters | 1995-04-04 |
| 5348713 | Recovery of metal values from zinc plant residues | Derek E. Kerfoot, Michael E. Chalkley | 1994-09-20 |