Issued Patents All Time
Showing 26–33 of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6680034 | Method for recovering metal values from metal-containing materials using high temperature pressure leaching | John O. Marsden, Robert E. Brewer, Wayne W. Hazen, Philip Thompson, David R. Baughman | 2004-01-20 |
| 6676909 | Method for recovery of metals from metal-containing materials using medium temperature pressure leaching | John O. Marsden, Robert E. Brewer, Wayne W. Hazen, Philip Thompson, David R. Baughman +1 more | 2004-01-13 |
| 6663689 | Process for direct electrowinning of copper | John O. Marsden, Robert E. Brewer, David R. Baughman, Philip Thompson, Wayne W. Hazen +1 more | 2003-12-16 |
| 6626979 | Method for improving metals recovery using high temperature pressure leaching | John O. Marsden, Robert E. Brewer, David R. Baughman, Philip Thompson, Wayne W. Hazen +1 more | 2003-09-30 |
| 6497745 | Method for processing elemental sulfur-bearing materials using high temperature pressure leaching | John O. Marsden, Robert E. Brewer, Wayne W. Hazen, Philip Thompson, David R. Baughman | 2002-12-24 |
| 6451088 | Method for improving metals recovery using high temperature leaching | John O. Marsden, Robert E. Brewer, David R. Baughman, Philip Thompson, Wayne W. Hazen +1 more | 2002-09-17 |
| 6451089 | Process for direct electrowinning of copper | John O. Marsden, Robert E. Brewer, David R. Baughman, Philip Thompson, Wayne W. Hazen +1 more | 2002-09-17 |
| 6019811 | Metals processing control by counting molten metal droplets | Eric M. Schlienger, David K. Melgaard, Gregory J. Shelmidine, James A. Van Den Avyle | 2000-02-01 |