Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4495994 | Thermal injection and in situ combustion process for heavy oils | Wann-Sheng Huang, Yick-Mow Shum | 1985-01-29 |
| 4491180 | Tapered steam injection process | Henry J. Grimm, Alvin J. Sustek, Jr. | 1985-01-01 |
| 4425968 | Selective water exclusion | Wilbur L. Hall | 1984-01-17 |
| 4299284 | High sweep efficiency enhanced oil recovery process | Mohan V. Kudchadker, James E. Varnon, Lawrence E. Whittington | 1981-11-10 |
| 4207945 | Recovering petroleum from subterranean formations | Wilbur L. Hall, Charles R. French, Ching H. Wu | 1980-06-17 |