Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4421552 | Dead roast-oxide flash reduction process for copper concentrates | James E. Hoffmann | 1983-12-20 |
| 4384940 | Chlorine leaching of nickel-cobalt-iron sulphides | David L. Jones | 1983-05-24 |
| 4304644 | Autoclave oxidation leaching of sulfide materials containing copper, nickel and/or cobalt | Grigori S. Victorovich, Norman C. Nissen | 1981-12-08 |
| 4280988 | Recovery of nickel and cobalt from leach slurries | Gerald V. Glaum, Einar Walli | 1981-07-28 |
| 4272493 | Pelletizing sulfation of anode slimes | Rotrou A. Hall, Gerald V. Glaum | 1981-06-09 |
| 4229270 | Process for the recovery of metal values from anode slimes | Malcolm Charles Evert Bell, John A. Thomas, Norman C. Nissen | 1980-10-21 |