Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11697600 | Vanadium extraction from disparate shale ores | David Dreisinger, Jodi Esplin, Mike Johnson, Erin Legault, Michael Mracek +3 more | 2023-07-11 |
| 10822253 | Anion removal from waste water | David Dreisinger, Michael Schrock | 2020-11-03 |
| 10442703 | Anion removal from waste water | David Dreisinger, Michael Schrock | 2019-10-15 |
| 8062614 | Methods for improving the recovery of metal leaching agents | Andrew Nisbett | 2011-11-22 |
| 7799294 | Methods for improving the recovery of metal leaching agents | Andrew Nisbett | 2010-09-21 |
| 7635457 | Method for heap and dump leaching coupled with solvent extraction for metal recovery | Andrew Nisbett, Hans C. Hein | 2009-12-22 |
| 7214256 | Solvent extraction process | Hans Hein Steger | 2007-05-08 |
| 7025899 | Concentrated solutions of oxime metal extractants and method of formulating extractant compositions therefrom | R. Brantley Sudderth, George A. Wolfe, Ralph L. Jensen, Michael J. Virnig, Mary Collins +3 more | 2006-04-11 |
| 6242625 | Process for extracting copper values from copper containing ores | — | 2001-06-05 |
| 6210647 | Process of recovery of metals from aqueous ammoniacal solutions employing an ammonia antagonist having only hydrogen bond acceptor properties | Michael J. Virnig, George A. Wolfe, J. Murdoch MacKenzie | 2001-04-03 |
| 6107523 | Beta-diketones for the extraction of copper from aqueous ammoniacal solutions | Michael J. Virnig, Sang I. Kang, Kevin Martin, Phillip L. Mattison | 2000-08-22 |
| 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, G. Timothy Fisher | 2000-05-09 |
| 5654458 | Recovery of palladium | Michael D. Fabiano, Phillip L. Mattison, Michael J. Virnig, Bert Gruber, Steven M. Hoagland | 1997-08-05 |
| 5514823 | Bis-(alkylsalicylidene)ethylene or phenylene diamines and transition metal complexes thereof | R. Brantley Sudderth | 1996-05-07 |
| 5470552 | Nickel extraction process | Stephen M. Olafson | 1995-11-28 |
| 5158603 | Process of extracting anions with quaternary amines | Thomas Stierman, Michael J. Virnig | 1992-10-27 |
| 4957714 | Solvent extraction process | Stephen M. Olafson, Roy G. Lewis | 1990-09-18 |
| 4582689 | Solvent extraction process | — | 1986-04-15 |
| 4544532 | Solvent extraction | R. Brantley Sudderth, J. Michael Sierakoski, Kenneth Mackay | 1985-10-01 |
| 4507268 | Solvent extraction | Kenneth Mackay, R. Brantley Sudderth, Joseph M. Sierakoski | 1985-03-26 |