Issued Patents 1982
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4336160 | Method and apparatus for cracking residual oils | Robert R. Dean, Robert W. Pfeiffer | 1982-06-22 |
| 4332674 | Method and apparatus for cracking residual oils | Robert R. Dean, Robert W. Pfeiffer | 1982-06-01 |
| 4331533 | Method and apparatus for cracking residual oils | Robert R. Dean, Robert W. Pfeiffer | 1982-05-25 |