Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6231641 | Enhanced phase interaction at the interface of molten slag and blister copper, and an apparatus for promoting same | Torstein Utigard, John F. Castle, David B. George | 2001-05-15 |
| 6210463 | Process and apparatus for the continuous refining of blister copper | David B. George, John F. Castle, Torstein Utigard | 2001-04-03 |
| 6174492 | Forebay for am Metallurgical furnace | John F. Castle, David B. George | 2001-01-16 |
| 5616168 | Hydrometallurgical processing of impurity streams generated during the pyrometallurgy of copper | J. Philip Evans | 1997-04-01 |
| 5443622 | Hydrometallurgical processing of impurity streams generated during the pyrometallurgy of copper | Kenton E. Sutliff, Barry A. Wells, J. Philip Evans | 1995-08-22 |
| 4241038 | Reduction of ferric chloride | Hayden Monk, John Lumsden | 1980-12-23 |