Issued Patents All Time
Showing 26–50 of 70 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6210647 | Process of recovery of metals from aqueous ammoniacal solutions employing an ammonia antagonist having only hydrogen bond acceptor properties | Gary A. Kordosky, George A. Wolfe, J. Murdoch MacKenzie | 2001-04-03 |
| 6197214 | Ammonium thiosulfate complex of gold or silver and an amine | J. Michael Sierakoski | 2001-03-06 |
| 6177055 | Process for extracting and recovering copper | Reuben H. Grinstein, R. Brantley Sudderth, George A. Wolfe, Stephen M. Olafson | 2001-01-23 |
| 6156280 | Process for removing manganese from organic solutions of oximes and nickel ore treatment process | Stephen M. Olafson, Burrel Boley | 2000-12-05 |
| 6107523 | Beta-diketones for the extraction of copper from aqueous ammoniacal solutions | Gary A. Kordosky, 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 | G. Timothy Fisher, Gary A. Kordosky | 2000-05-09 |
| 5993757 | Reoximation of metal extraction circuit organics | Leroy O. Krbechek, Mary I. Casey | 1999-11-30 |
| 5976218 | Process for the recovery of nickel | J. Murdoch MacKenzie | 1999-11-02 |
| 5968364 | Process for the removal of toxic cyanide and heavy metal species from alkaline solutions | Phillip L. Mattison, George A. Wolfe, J. Michael Sierakoski, J. Murdoch MacKenzie, Keith Weerts | 1999-10-19 |
| 5939034 | Process for the recovery of precious metal values from aqueous ammoniacal thiosulfate leach solutions | J. Michael Sierakoski | 1999-08-17 |
| 5936129 | Process for making sterically-hindered .beta.-diketones | Kevin Martin, Phillip L. Mattison | 1999-08-10 |
| 5908605 | Copper recovery process | R. Brantley Sudderth | 1999-06-01 |
| 5885327 | Process for the recovery of gold | — | 1999-03-23 |
| 5785935 | Process for removing mercury from soil | William E. Fristad, Dana K. Elliott | 1998-07-28 |
| 5744107 | Process for removing heavy metals from soil | William E. Fristad, Jonathan M. Cassel | 1998-04-28 |
| 5670035 | Method for recovering copper | J. Murdoch MacKenzie | 1997-09-23 |
| 5660806 | Process for removing lead from sandblasting wastes containing paint chips | William E. Fristad, Dana K. Elliott | 1997-08-26 |
| 5654458 | Recovery of palladium | Michael D. Fabiano, Gary A. Kordosky, Phillip L. Mattison, Bert Gruber, Steven M. Hoagland | 1997-08-05 |
| 5607060 | Method and apparatus for removing metal contamination from soil | William E. Fristad, Jeffrey L. Narum, Phillip L. Mattison, John Fast | 1997-03-04 |
| 5575918 | Method for recovery of polymers | Phillip L. Mattison, Keith Weerts | 1996-11-19 |
| 5522997 | Process for the removal of toxic cyanide and heavy metal species from alkaline solutions | Phillip L. Mattison, George A. Wolfe, J. Michael Sierakoski, Murdoch Mackenzie, Keith Weerts | 1996-06-04 |
| 5494649 | Process for removing heavy metals from paint chips | William E. Fristad, Jonathan M. Cassel, Dana K. Elliot | 1996-02-27 |
| 5466426 | Method and apparatus for removing metal contamination from soil | William E. Fristad, Jeffrey L. Narum, Phillip L. Mattison, John Fast | 1995-11-14 |
| 5340380 | Recovery of precious metal | — | 1994-08-23 |
| 5198021 | Recovery of precious metal | — | 1993-03-30 |