Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6833020 | Recovery of copper from copper bearing sulphide minerals by bioleaching with controlled oxygen feed | David Dew, Petrus Basson | 2004-12-21 |
| 6582494 | Recovery of nickel and copper from sulphide concentrates by bioleaching | David Dew | 2003-06-24 |
| 6245125 | Copper, nickel and cobalt recovery | David Dew | 2001-06-12 |