Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 4662443 | Combination air-blown and oxygen-blown underground coal gasification process | Rajen Puri, Bruce W. Gash | 1987-05-05 | $13,337,000 |
| 4648450 | Method of producing synthesis gas by underground gasification of coal using specific well configuration | Bruce W. Gash, Elton B. Hunt, Jr., David R. Parrish | 1987-03-10 | $26,910,000 |