Patent US2888987A successfully refreshed from Google Patents.
US2888987A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of hydrocarbons by in situ combustion
Assignee: Phillips Petroleum Co
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Filing: 1958-04-07
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Granted: 1959-06-02
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Expires: 1978-04-07
Abstract
No abstract record available.
Inventors
- 👤 Harry W Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:39
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/30; E21B43/16; E21B43/24; E21B43/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A PROCESS FOR PRODUCING HYDROCARBONS FROM A STRATUM CONTAINING COMBUSTIBLE CARBONACEOUS MATERIAL WHICH COMPRISES MOVING A COMBUSTION FRONT FROM AN INGITION BOREHOLE TO AN INJECTION BOREHOLE IN SAID STRATUM IN AN INVERSE BURNING PHASE BY IGNITING SAID STRATUM AT SAID INGNITON BOREHOLE AND PASSING O2-CONTAINING GAS THRU
Claim 2
Dependent Claim
47 words
A PROCESS FOR PRODUCING HYDROCARBONS FROM A STRATUM CONTAINING COMBUSTIBLE CARBONACEOUS MATERIAL WHICH COMPRISES MOVING A COMBUSTION FRONT FROM AN INGITION BOREHOLE TO AN INJECTION BOREHOLE IN SAID STRATUM IN AN INVERSE BURNING PHASE BY IGNITING SAID STRATUM AT SAID INGNITON BOREHOLE AND PASSING O2-CONTAINING GAS THRU
References Cited (Backward Citations)
US2347778A
Cited
US2793696A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |