Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4420389 | De-ashing lubricating oils | Jerald A. Howell, Donald C. Tabler | 1983-12-13 |
| 4383977 | Catalytic alkylation apparatus with hydrocarbon recycle | Thomas Hutson, Jr., Donald J. Makovec | 1983-05-17 |
| 4276439 | Catalytic alkylation method and apparatus with hydrocarbon recycle | Thomas Hutson, Jr., Donald J. Makovec | 1981-06-30 |