US2906337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of recovering bitumen
Assignee: Pure Oil Co
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Filing: 1957-08-16
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Granted: 1959-09-29
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Expires: 1977-08-16
Abstract
No abstract record available.
Inventors
- 👤 Hennig Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:41
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
THE PROCESS OF RECOVERING BITUMEN FROM UNDERGROUND FORMATIONS WHICH COMPRISES ESTABLISHING A PLURALITY OF SPACED EARTH BORES PENETRATING INTO THE BITUMINOUS STRATA, FORMING PASSAGEWAYS BETWEEN THE EARTH BORES ADJACENT THE BOTTOM OF SAID BITUMINOUS STRATA, PASSING A GASEOUS AGENT INTO A SELECTED ONE OF SAID EARTH BORES THROUGH SAID PASSAGEWAYS AT A TEMPERATURE SUFFICIENT TO FLUIDIZE A SUBSTANTIAL PORTION OF SAID BITUMEN WITHIN AND ABOVE SAID PASSAGEWAYS, CONVEYING THE EFFLUENT TO AT LEAST ONE OUTPUT EARTH BORE CONNECTED THEREWITH, MOVING THE LOCALE OF PASSAGE OF SAID GASEOUS AGENT UPWARDLY IN SAID STRATA UNTIL THE TOP IS REACHED AND SUBSTANTIALLY ALL OF SAID STRATA HAS BEEN HEATED RECOVERING THE BITUMEN FROM SAID EFFLUENT AND RECYCLING THE GASEOUS AGENT TO ANOTHER EARTH BORE, PASSING A STRIPPING MEDIUM INTO SAID SELECTED EARTH BORE AT A TEMPERATURE SUFFICIENT TO VAPORIZE AND DECOMPOSE A SUBSTANTIAL PORTION OF SAID
Claim 2
Dependent Claim
143 words
THE PROCESS OF RECOVERING BITUMEN FROM UNDERGROUND FORMATIONS WHICH COMPRISES ESTABLISHING A PLURALITY OF SPACED EARTH BORES PENETRATING INTO THE BITUMINOUS STRATA, FORMING PASSAGEWAYS BETWEEN THE EARTH BORES ADJACENT THE BOTTOM OF SAID BITUMINOUS STRATA, PASSING A GASEOUS AGENT INTO A SELECTED ONE OF SAID EARTH BORES THROUGH SAID PASSAGEWAYS AT A TEMPERATURE SUFFICIENT TO FLUIDIZE A SUBSTANTIAL PORTION OF SAID BITUMEN WITHIN AND ABOVE SAID PASSAGEWAYS, CONVEYING THE EFFLUENT TO AT LEAST ONE OUTPUT EARTH BORE CONNECTED THEREWITH, MOVING THE LOCALE OF PASSAGE OF SAID GASEOUS AGENT UPWARDLY IN SAID STRATA UNTIL THE TOP IS REACHED AND SUBSTANTIALLY ALL OF SAID STRATA HAS BEEN HEATED RECOVERING THE BITUMEN FROM SAID EFFLUENT AND RECYCLING THE GASEOUS AGENT TO ANOTHER EARTH BORE, PASSING A STRIPPING MEDIUM INTO SAID SELECTED EARTH BORE AT A TEMPERATURE SUFFICIENT TO VAPORIZE AND DECOMPOSE A SUBSTANTIAL PORTION OF SAID
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-28 | 1963-03-30 | 1963-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-28 | 1967-03-30 | 1967-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-28 | 1971-03-30 | 1971-09-29 | $7700.00 | Window Closed / Lapsed |