Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4973455 | Recovery of lanthanides | William DOYLE | 1990-11-27 |
| 4721606 | Recovery of metal values from spent catalysts | — | 1988-01-26 |
| 4497785 | Production of rare earth compounds | Allen W. Doty | 1985-02-05 |
| 4343774 | Method for recovering valuable metals from deactivated catalysts | — | 1982-08-10 |