Issued Patents All Time
Showing 26–41 of 41 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4359246 | In situ oil shale retort with non-uniformly distributed void fraction | — | 1982-11-16 |
| 4353598 | Method of blasting pillars with vertical blastholes | — | 1982-10-12 |
| 4347789 | Downhole delay assembly for blasting with series delay | — | 1982-09-07 |
| 4336966 | Cratering in the deep cratering region to form an in situ oil shale retort | — | 1982-06-29 |
| 4333684 | Method of uniform rubblization for limited void volume blasting | Bruce B. Redpath | 1982-06-08 |
| 4326752 | Method for forming an in situ oil shale retort | — | 1982-04-27 |
| 4326751 | Blasting to a horizontal free face with mixing of fragments | — | 1982-04-27 |
| 4303273 | In situ oil shale retort with a generally T-shaped vertical cross section | — | 1981-12-01 |
| 4300800 | Method of rubbling a pillar | — | 1981-11-17 |
| 4296968 | In situ oil shale retort having horizontally offset pillars | Ned M. Hutchins, Irving G. Studebaker | 1981-10-27 |
| 4290649 | Method for explosively expanding a pillar for forming an in situ oil shale retort | — | 1981-09-22 |
| 4281878 | Method for loading explosive laterally from a borehole | — | 1981-08-04 |
| 4262965 | Triangular blasting into limited voids for vertical free face retorts | — | 1981-04-21 |
| 4245865 | Explosive expansion to a limited void with uniform scaled depth of burial | — | 1981-01-20 |
| 4238136 | Formation of in situ oil shale retort with void at the top | — | 1980-12-09 |
| 4192554 | Method for explosive expansion toward horizontal free faces for forming an in situ oil shale retort | — | 1980-03-11 |