Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6599414 | Solvent extraction processes for metal recovery | Michael J. Virnig | 2003-07-29 |
| 6432166 | Dust control | Stephen M. Olafson, Michael J. Virnig | 2002-08-13 |
| 6395062 | Process for recovery of metals from metal-containing ores | Stephen M. Olafson, Michael J. Virnig | 2002-05-28 |
| 6060029 | Process for extraction of metals from aqueous ammoniacal solutions with beta-diketone extractants while maintaining a voltage potential to control entrainment of the aqueous layer into the organic layer | Michael J. Virnig, Gary A. Kordosky | 2000-05-09 |