|
| US3950029 | 12 Jun 1975 | 13 Abr 1976 | Mobil Oil Corporation | In situ retorting of oil shale |
| US3994343 | 4 Mar 1974 | 30 Nov 1976 | Occidental Petroleum Corporation | Process for in situ oil shale retorting with off gas recycling |
| US4022511 | 10 Mar 1975 | 10 May 1977 | Occidental Petroleum Corporation | Recovery of liquid and gaseous products from an in situ oil shale retort |
| US4029360 | 2 Abr 1976 | 14 Jun 1977 | Occidental Oil Shale, Inc. | Method of recovering oil and water from in situ oil shale retort flue gas |
| US4043596 | 11 Ago 1975 | 23 Ago 1977 | Occidental Oil Shale, Inc. | Forming shale oil recovery retort by blasting into slot-shaped columner void |
| US4043597 | 17 Feb 1976 | 23 Ago 1977 | Occidental Oil Shale, Inc. | Multiple level preparation of oil shale retort |
| US4043598 | 20 Feb 1976 | 23 Ago 1977 | Occidental Oil Shale, Inc. | Multiple zone preparation of oil shale retort |
| US4082145 | 18 May 1977 | 4 Abr 1978 | Occidental Oil Shale, Inc. | Determining the locus of a processing zone in an in situ oil shale retort by sound monitoring |
| US4089375 | 13 May 1977 | 16 May 1978 | Occidental Oil Shale, Inc. | In situ retorting with water vaporized in situ |
| US4106814 | 15 Jul 1977 | 15 Ago 1978 | Occidental Oil Shale, Inc. | Method of forming in situ oil shale retorts |
| US4118071 | 25 Abr 1977 | 3 Oct 1978 | Occidental Oil Shale, Inc. | In situ oil shale retort with a horizontal sill pillar |
| US4140343 | 14 Feb 1977 | 20 Feb 1979 | Occidental Oil Shale, Inc. | Gas withdrawal from an in situ oil shale retort |
| US4146272 | 14 Sep 1977 | 27 Mar 1979 | Occidental Oil Shale, Inc. | Explosive placement for explosive expansion toward spaced apart voids |
| US4150722 | 10 Mar 1978 | 24 Abr 1979 | Occidental Oil Shale, Inc. | Determining the locus of a retorting zone in an oil shale retort by rate of shale oil production |
| US4191251 | 1 Ago 1978 | 4 Mar 1980 | Occidental Oil Shale, Inc. | Process for recovering carbonaceous values from in situ oil shale retorting |
| US4194788 | 1 Mar 1978 | 25 Mar 1980 | Gulf Oil Corporation | Method of forming a rubblized in-situ retort |
| US4202168 | 18 Jul 1878 | 13 May 1980 | Gulf Research & Development Company | Method for the recovery of power from LHV gas |
| US4224990 | 19 Ene 1979 | 30 Sep 1980 | Occidental Oil Shale, Inc. | Method for flattening the combustion zone in an in situ oil shale retort by the addition of fuel |
| US4231617 | 14 Dic 1978 | 4 Nov 1980 | Gulf Oil Corporation | Consolidation of in-situ retort |
| US4234230 | 11 Jul 1979 | 18 Nov 1980 | The Superior Oil Company | In situ processing of mined oil shale |
| US4243100 | 4 May 1979 | 6 Ene 1981 | Occidental Oil Shale, Inc. | Operation of in situ oil shale retort with void at the top |
| US4246965 | 4 Sep 1979 | 27 Ene 1981 | Occidental Oil Shale, Inc. | Method for operating an in situ oil shale retort having channelling |
| US4285547 | 1 Feb 1980 | 25 Ago 1981 | Multi Mineral Corporation | Integrated in situ shale oil and mineral recovery process |
| US4303273 | 2 Nov 1979 | 1 Dic 1981 | Occidental Oil Shale, Inc. | In situ oil shale retort with a generally T-shaped vertical cross section |
| US4349227 | 12 Feb 1981 | 14 Sep 1982 | Occidental Oil Shale | Mining system for in situ oil shale retorts |
| US4357051 | 2 Jun 1980 | 2 Nov 1982 | Occidental Oil Shale, Inc. | Withdrawal of gases and liquids from an in situ oil shale retort |
| US4360233 | 30 Oct 1980 | 23 Nov 1982 | Occidental Oil Shale, Inc. | Method of bulking an in situ oil shale retort substantially full of fragmented shale |
| US4378949 | 27 Abr 1981 | 5 Abr 1983 | Gulf Oil Corporation | Production of shale oil by in-situ retorting of oil shale |
| US4385784 | 27 Oct 1980 | 31 May 1983 | Occidental Oil Shale, Inc. | Method for forming an in situ oil shale retort |
| US4440445 | 30 Nov 1981 | 3 Abr 1984 | Occidental Oil Shale, Inc. | Fluid outlet at the bottom of an in situ oil shale retort |
| US4449753 | 1 Jun 1982 | 22 May 1984 | Occidental Oil Shale, Inc. | Method for bulking full a retort |
| US4470460 | 26 Nov 1982 | 11 Sep 1984 | Ashland Oil, Inc. | In situ retorting or oil shale |
| US4502539 | 2 Mar 1983 | 5 Mar 1985 | | Method for the underground gasification of coal or browncoal |
| US4611856 | 16 Sep 1983 | 16 Sep 1986 | Occidental Oil Shale, Inc. | Two-level, horizontal free face mining system for in situ oil shale retorts |
