Issued Patents All Time
Showing 25 most recent of 36 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10640847 | Recovery of rare earths from concentrates containing fluorine | Kang Sun, Wayne W. Hazen | 2020-05-05 |
| 10246789 | Systems and methods for copper recovery via roasting and leaching | Joanna M. Robertson, Thomas R. Bolles, Wayne W. Hazen, Lawrence D. May, Jay C. Smith | 2019-04-02 |
| 9340849 | Systems and methods for metal recovery | Joanna M. Robertson, Thomas R. Bolles, Wayne W. Hazen, Lawrence D. May, Jay C. Smith | 2016-05-17 |
| 9102999 | Methods of recovering scandium from titanium residue streams | Christopher Jeffrey Hartley, Wayne W. Hazen, Christel Maria Angelina Bemelmans, Pavel Federovich Belits, Timothy James Lanyk +4 more | 2015-08-11 |
| 8920773 | Systems and methods for metal recovery | Joanna M. Robertson, Thomas R. Bolles, Wayne W. Hazen, Lawrence D. May, Jay C. Smith | 2014-12-30 |
| 8506673 | Silica removal from pregnant leach solutions | James D. Gillaspie, Dennis D. Gertenbach, Wayne W. Hazen, George Owusu, John C. Wilmot | 2013-08-13 |
| 8114365 | Silica removal from pregnant leach solutions | James D. Gillaspie, Dennis D. Gertenbach, Wayne W. Hazen, George Owusu, John C. Wilmot | 2012-02-14 |
| 8012318 | Process for multiple stage direct electrowinning of copper | John O. Marsden, Robert E. Brewer, Susan R Brewer, Joanna M. Robertson, Philip Thompson +2 more | 2011-09-06 |
| 7736487 | Process for recovery of copper from copper-bearing material using pressure leaching, direct electrowinning and solution extraction | John O. Marsden, John C. Wilmot, Christy Green, Wayne W. Hazen | 2010-06-15 |
| 7736488 | Process for recovery of copper from copper-bearing material using pressure leaching, direct electrowinning and solvent/solution extraction | John O. Marsden, Robert E. Brewer, Susan R Brewer, Joanna M. Robertson, Philip Thompson +2 more | 2010-06-15 |
| 7722756 | Process for multiple stage direct electrowinning of copper | John O. Marsden, Joanna M. Robertson, Robert E. Brewer, Philip Thompson, Wayne W. Hazen +1 more | 2010-05-25 |
| 7691347 | Silica removal from pregnant leach solutions | James D. Gillaspie, Dennis D. Gertenbach, Wayne W. Hazen, George Owusu, John C. Wilmot | 2010-04-06 |
| 7666371 | Method for recovering metal values from metal-containing materials using high temperature pressure leaching | John O. Marsden, Robert E. Brewer, Joanna M. Robertson, Wayne W. Hazen, Philip Thompson | 2010-02-23 |
| 7517384 | Method for improving metals recovery using high temperature pressure leaching | John O. Marsden, Robert E. Brewer, Joanna M. Robertson, Philip Thompson, Wayne W. Hazen +1 more | 2009-04-14 |
| 7485216 | Process for recovery of copper from copper-bearing material using pressure leaching, direct electrowinning and solvent/solution extraction | John O. Marsden, Joanna M. Robertson, Philip Thompson, Wayne W. Hazen, Christel M. A. Bemelmans +1 more | 2009-02-03 |
| 7476308 | Process for multiple stage direct electrowinning of copper | John O. Marsden, Robert E. Brewer, Joanna M. Robertson, Phillip Thompson, Wayne W. Hazen +1 more | 2009-01-13 |
| 7473413 | Method for recovering metal values from metal-containing materials using high temperature pressure leaching | John O. Marsden, Robert E. Brewer, Joanna M. Robertson, Wayne W. Hazen, Philip Thompson | 2009-01-06 |
| 7462272 | Process for multiple stage direct electrowinning of copper | John O. Marsden, Joanna M. Robertson, Philip Thompson, Wayne W. Hazen, Christel M. A. Bemelmans +1 more | 2008-12-09 |
| 7341700 | Method for recovery of metals from metal-containing materials using medium temperature pressure leaching | John O. Marsden, Robert E. Brewer, Joanna M. Robertson, Wayne W. Hazen, Philip Thompson +1 more | 2008-03-11 |
| 7125436 | Method for improving metals recovery using high temperature pressure leaching | John O. Marsden, Robert E. Brewer, Joanna M. Robertson, Philip Thompson, Wayne W. Hazen +1 more | 2006-10-24 |
| 7041152 | Method for processing elemental sulfur-bearing materials using high temperature pressure leaching | John O. Marsden, Robert E. Brewer, Joanna M. Robertson, Wayne W. Hazen, Philip Thompson | 2006-05-09 |
| 6972107 | System for direct electrowinning of copper | John O. Marsden, Robert E. Brewer, Joanna M. Robertson, Philip Thompson, Wayne W. Hazen +1 more | 2005-12-06 |
| 6893482 | Method for improving metals recovery using high temperature pressure leaching | John O. Marsden, Robert E. Brewer, Joanna M. Robertson, Philip Thompson, Wayne W. Hazen +1 more | 2005-05-17 |
| 6890371 | Method for processing elemental sulfur-bearing materials using high temperature pressure leaching | John O. Marsden, Robert E. Brewer, Joanna M. Robertson, Wayne W. Hazen, Philip Thompson | 2005-05-10 |
| 6680034 | Method for recovering metal values from metal-containing materials using high temperature pressure leaching | John O. Marsden, Robert E. Brewer, Joanna M. Robertson, Wayne W. Hazen, Philip Thompson | 2004-01-20 |