Issued Patents All Time
Showing 51–52 of 52 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4434852 | Method of enhanced oil recovery employing nitrogen injection | Stewart Haynes, Jr., Jack H. Park | 1984-03-06 |
| 4418753 | Method of enhanced oil recovery employing nitrogen injection | Stewart Haynes, Jr. | 1983-12-06 |