Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7025899 | Concentrated solutions of oxime metal extractants and method of formulating extractant compositions therefrom | R. Brantley Sudderth, Ralph L. Jensen, Gary A. Kordosky, Michael J. Virnig, Mary Collins +3 more | 2006-04-11 |
| 6632410 | Solvent extraction process | Sang I. Kang, Phillip L. Mattison, Michael J. Virnig, R. Brantley Sudderth | 2003-10-14 |
| 6342635 | Ketoximes, processes therefor, and copper extraction process | Michael J. Virnig, Horst Josten, Mary Collins, Dustin Gordon, Rainer Eskuchen +3 more | 2002-01-29 |
| 6261526 | Nickel recovery process and compositions for use therein | Michael J. Virnig | 2001-07-17 |
| 6210647 | Process of recovery of metals from aqueous ammoniacal solutions employing an ammonia antagonist having only hydrogen bond acceptor properties | Michael J. Virnig, Gary A. Kordosky, J. Murdoch MacKenzie | 2001-04-03 |
| 6177055 | Process for extracting and recovering copper | Michael J. Virnig, Reuben H. Grinstein, R. Brantley Sudderth, Stephen M. Olafson | 2001-01-23 |
| 5968364 | Process for the removal of toxic cyanide and heavy metal species from alkaline solutions | Michael J. Virnig, Phillip L. Mattison, J. Michael Sierakoski, J. Murdoch MacKenzie, Keith Weerts | 1999-10-19 |
| 5522997 | Process for the removal of toxic cyanide and heavy metal species from alkaline solutions | Michael J. Virnig, Phillip L. Mattison, J. Michael Sierakoski, Murdoch Mackenzie, Keith Weerts | 1996-06-04 |