Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5221525 | Solvent extraction of gallium from acidic solutions containing phosphorus | Michael E. Coleman, Susan Roberts | 1993-06-22 |
| 4261737 | Recovery of cobalt values | Richard T. Um | 1981-04-14 |
| 4200455 | Hydrometallurgical recovery of metal values | John C. Stauter, Richard T. Um, Frank A. Stephens, Yoon T. Auck | 1980-04-29 |