US2967052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
In situ combustion process
Assignee: Phillips Petroleum Co
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Filing: 1958-03-31
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Granted: 1961-01-03
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Expires: 1978-03-31
Abstract
No abstract record available.
Inventors
- 👤 Francis W Crawford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:44
CPC Classifications
E; E21; E21B; E21B36/00; E21B36/02; E21B7/00; E21B7/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A PROCESS FOR COMPLETING AN IGNITION BOREHOLE IN A STRATUM CONTAINING CARBONACEOUS MATERIAL WHICH COMPRISES DRILLING A BOREHOLE TO SAID STRATUM FROM THE SURFACE; DRILLING FROM SAID BOREHOLE THRU SAID STRATUM WITH A FLAME DRILL BY CONTINUOUSLY DIRECTING A FLAME INTO SAID STRATUM WHEREBY SAID STRATUM IS HEATED TO IGNITION TEMPERATURE; AND SIMULTANEOUSLY CONTACTING THE WALL OF SAID BOREHOLE WITHIN SAID STRATUM WITH O2-CONTAINING GAS SO TO
Claim 2
Dependent Claim
67 words
A PROCESS FOR COMPLETING AN IGNITION BOREHOLE IN A STRATUM CONTAINING CARBONACEOUS MATERIAL WHICH COMPRISES DRILLING A BOREHOLE TO SAID STRATUM FROM THE SURFACE; DRILLING FROM SAID BOREHOLE THRU SAID STRATUM WITH A FLAME DRILL BY CONTINUOUSLY DIRECTING A FLAME INTO SAID STRATUM WHEREBY SAID STRATUM IS HEATED TO IGNITION TEMPERATURE; AND SIMULTANEOUSLY CONTACTING THE WALL OF SAID BOREHOLE WITHIN SAID STRATUM WITH O2-CONTAINING GAS SO TO
References Cited (Backward Citations)
US2584605A
Cited
US2688464A
Cited
US2833516A
Cited
US2780449A
Cited
US2818118A
Cited
US2889882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-03 | 1964-07-04 | 1965-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-03 | 1968-07-04 | 1969-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-03 | 1972-07-04 | 1973-01-03 | $7700.00 | Window Closed / Lapsed |