Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6440194 | Recovery of precious metals from metal alloys produced aluminothermically from base metal smelter slag | David Krofchak | 2002-08-27 |
| 6231767 | Treatment of phosphatic wastes | David Krofchak | 2001-05-15 |
| 6026965 | Process for recovering mineral particles, metal particles or small precious stones from an aqueous slim associated with an ore body or mineral deposit or processing thereof | David Krofchak, Peter Howe, David M. Howe | 2000-02-22 |