Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4801329 | Metal value recovery from carbonaceous ores | Thomas J. Clough, John W. Sibert | 1989-01-31 |
| 4765827 | Metal value recovery | Thomas J. Clough, John W. Sibert | 1988-08-23 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4801329 | Metal value recovery from carbonaceous ores | Thomas J. Clough, John W. Sibert | 1989-01-31 |
| 4765827 | Metal value recovery | Thomas J. Clough, John W. Sibert | 1988-08-23 |