Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6197214 | Ammonium thiosulfate complex of gold or silver and an amine | Michael J. Virnig | 2001-03-06 |
| 5968364 | Process for the removal of toxic cyanide and heavy metal species from alkaline solutions | Michael J. Virnig, Phillip L. Mattison, George A. Wolfe, J. Murdoch MacKenzie, Keith Weerts | 1999-10-19 |
| 5939034 | Process for the recovery of precious metal values from aqueous ammoniacal thiosulfate leach solutions | Michael J. Virnig | 1999-08-17 |
| 5522997 | Process for the removal of toxic cyanide and heavy metal species from alkaline solutions | Michael J. Virnig, Phillip L. Mattison, George A. Wolfe, Murdoch Mackenzie, Keith Weerts | 1996-06-04 |
| 4544532 | Solvent extraction | Gary A. Kordosky, R. Brantley Sudderth, Kenneth Mackay | 1985-10-01 |