US2853137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil recovery by in situ-combustion
Assignee: Phillips Petroleum Co
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Filing: 1956-05-14
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Granted: 1958-09-23
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Expires: 1976-05-14
Abstract
No abstract record available.
Inventors
- 👤 John W Marx
- 👤 Mehmet R Tek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:43
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/243; E21B43/247; Y; Y10; Y10S; Y10S48/00; Y10S48/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A PROCESS FOR RECOVERING HYDROCARBONS FROM AN UNDERGROUND FORMATION CONTAINING THE SAME COVERED BY AN AIR-PERVIOUS OVERBURDEN EXTENDING TO THE GROUND SURFACE, WHICH COMPRISES INITIATING COMBUSTION OF HYDROCARBONS IN A LOWER SECTION OF SAID FORMATION TO PRODUCE A BURNED OUT ZONE THEREIN; REDUCING THE PRESSURE IN SAID BURNED OUT ZONE SO AS TO CAUSE AIR TO FLOW THRU SAID POROUS OVERBURDEN DIRECTLY FROM THE ATMOSPHERE OVER A LARGE AREA OF THE EXPOSED SURFACE OF SAME AND THRU
Claim 2
Dependent Claim
77 words
A PROCESS FOR RECOVERING HYDROCARBONS FROM AN UNDERGROUND FORMATION CONTAINING THE SAME COVERED BY AN AIR-PERVIOUS OVERBURDEN EXTENDING TO THE GROUND SURFACE, WHICH COMPRISES INITIATING COMBUSTION OF HYDROCARBONS IN A LOWER SECTION OF SAID FORMATION TO PRODUCE A BURNED OUT ZONE THEREIN; REDUCING THE PRESSURE IN SAID BURNED OUT ZONE SO AS TO CAUSE AIR TO FLOW THRU SAID POROUS OVERBURDEN DIRECTLY FROM THE ATMOSPHERE OVER A LARGE AREA OF THE EXPOSED SURFACE OF SAME AND THRU
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) | 1961-09-22 | 1962-03-24 | 1962-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-22 | 1966-03-24 | 1966-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-22 | 1970-03-24 | 1970-09-23 | $7700.00 | Window Closed / Lapsed |