Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4924942 | Well forming process | — | 1990-05-15 |
| 4844164 | Process and composition for treating underground formations penetrated by a well borehole | — | 1989-07-04 |
| 4595056 | Method for fully retorting an in situ oil shale retort | Raymond L. Zahradnik, Carl L. Jacobson | 1986-06-17 |
| 4448249 | Method of in situ oil shale retort ignition with oxygen control | Frederick M. Gragg, Carl L. Jacobson | 1984-05-15 |
| 4444256 | Method for inhibiting sloughing of unfragmented formation in an in situ oil shale retort | — | 1984-04-24 |