Patent US3019837A successfully refreshed from Google Patents.
US3019837A
Expired / Lapsed
US
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In situ combustion process
Assignee: Phillips Petroleum Co
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Filing: 1957-10-28
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Granted: 1962-02-06
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Expires: 1977-10-28
Abstract
No abstract record available.
Inventors
- 👤 John W Marx
- 👤 Richard H Langenheim
- 👤 Henry O Dixon
- 👤 Joseph C Trantham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:16
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/243
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
105 words
A PROCESS FOR INITIATING IN SITU COMBUSTION IN A PERMEABLE STRATUM CONTAINING COMBUSTIBLE CARBONACEOUS MATERIAL WHICH COMPRISES PASSING AIR THRU A SECTION OF SAID STRATUM BETWEEN A FIRST WELL AND SECOND WELL THEREIN SO AS TO EFFECT ABSORPTION OF 02 BY SAID STRATUM; CONTINUING THE PASSING OF AIR THRU SAID STRATUM FOR AT LEAST 10 HOURS AND UNTIL THE O2 CONCENTRATION IN THE EFFLUENT GAS IS SUBSTANTIALLY THAT OF THE INJECTED AIR; THEREAFTER IGNITING SAID STRATUM AROUND ONE OF SAID WELLS TO ESTABLISH A COMBUSTION ZONE IN THE ADJACENT STRATUM; AND MOVING SAID COMBUSTION ZONE THRU SAID STRATUM BETWEEN THE WELLS BY FEEDING AIR THERETO.
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) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |