Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4243639 | Method for recovering vanadium from petroleum coke | Frank C. Haas | 1981-01-06 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4243639 | Method for recovering vanadium from petroleum coke | Frank C. Haas | 1981-01-06 |