Patent US3126956A successfully refreshed from Google Patents.
US3126956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming underground combustion front
Assignee: —
•
Filing: —
•
Granted: 1964-03-31
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Expires: 1981-03-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:14
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
IN A PROCESS FOR FORMING A COMBUSITON FRONT IN AN UNDERGROUND CARBONACEOUS DEPOSIT PENETRATED BY AN INJECTION WELL AND A PRODUCING WELL, THE IMPROVEMENT WHICH COMPRISES HEATING A PORTION OF SAID DEPOSIT AT THE FACE OF SAID INJECTION WELL TO A COMBUSTION SUPPORTING TEMPERATURE WHEREBY CARBONACEOUS MATERIAL ON THE FACE OF SAID WELL IS VAPORIZED, INJECTING INTO SAID DEPOSIT VIA SAID PRODUCING WELL A GAS SELECTED FROM THE GROUP CONSISTING OF AIR AND OXYGEN-ENRICHED AIR, FORCING SAID GAS THROUGH SAID DEPOSIT INTO SAID INJECTION WELL TO FORM A COMBUSTIBLE MIXTURE OF SAID GAS AND SAID VAPORIZED CARBONACEOUS MATERIAL IN SAID INJECTION WELL, ALLOWING SAID
Claim 2
Dependent Claim
104 words
IN A PROCESS FOR FORMING A COMBUSITON FRONT IN AN UNDERGROUND CARBONACEOUS DEPOSIT PENETRATED BY AN INJECTION WELL AND A PRODUCING WELL, THE IMPROVEMENT WHICH COMPRISES HEATING A PORTION OF SAID DEPOSIT AT THE FACE OF SAID INJECTION WELL TO A COMBUSTION SUPPORTING TEMPERATURE WHEREBY CARBONACEOUS MATERIAL ON THE FACE OF SAID WELL IS VAPORIZED, INJECTING INTO SAID DEPOSIT VIA SAID PRODUCING WELL A GAS SELECTED FROM THE GROUP CONSISTING OF AIR AND OXYGEN-ENRICHED AIR, FORCING SAID GAS THROUGH SAID DEPOSIT INTO SAID INJECTION WELL TO FORM A COMBUSTIBLE MIXTURE OF SAID GAS AND SAID VAPORIZED CARBONACEOUS MATERIAL IN SAID INJECTION WELL, ALLOWING SAID
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-31 | 1967-09-30 | 1968-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-31 | 1971-09-30 | 1972-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-31 | 1975-09-30 | 1976-03-31 | $7700.00 | Window Closed / Lapsed |