Patent US2504683A successfully refreshed from Google Patents.
US2863510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for igniting hydrocarbon materials present within oil-bearing formations
Assignee: Shell Development Co
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Filing: 1955-07-25
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Granted: 1958-12-09
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Expires: 1975-07-25
Abstract
No abstract record available.
Inventors
- 👤 Harco J Tadema
- 👤 Johannes T Quant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:49
CPC Classifications
E; E21; E21B; E21B36/00; E21B36/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
IN THE PRODUCTION OF PETROLEUM BY MEANS OF UNDERGROUND COMBUSTION OF COMBUSTIBLE HYDROCARBON MATERIAL PRESENT IN AN OIL-BEARING FORMATION PENETRATED BY A BOREHOLE, THE METHOD OF IGNITING SAID COMBUSTIBLE MATERIAL COMPRISING THE STEPS OF INTRODUCING INTO SAID BOREHOLE AND CONTACTING WITH SAID COMBUSTIBLE MATERIAL AN AMOUNT OF A READILY OXIDIZABLE MATERIAL WHICH IS NORMALLY A LIQUID AND A GASEOUS OXIDANT WHICH REACTS SPONTANEOUSLY AT BOREHOLD CONDITIONS WITH SAID LIQUID TO RAISE THE TEMPERATURE AT SAID COMBUSTIBLE MATERIAL TO ITS IGNITIOIN POINT WITH COMBUSTION TAKING PLACE WHILE THE OXIDIZABLE LIQUID IS IN LIQUID FORM.
Claim 2
Dependent Claim
93 words
IN THE PRODUCTION OF PETROLEUM BY MEANS OF UNDERGROUND COMBUSTION OF COMBUSTIBLE HYDROCARBON MATERIAL PRESENT IN AN OIL-BEARING FORMATION PENETRATED BY A BOREHOLE, THE METHOD OF IGNITING SAID COMBUSTIBLE MATERIAL COMPRISING THE STEPS OF INTRODUCING INTO SAID BOREHOLE AND CONTACTING WITH SAID COMBUSTIBLE MATERIAL AN AMOUNT OF A READILY OXIDIZABLE MATERIAL WHICH IS NORMALLY A LIQUID AND A GASEOUS OXIDANT WHICH REACTS SPONTANEOUSLY AT BOREHOLD CONDITIONS WITH SAID LIQUID TO RAISE THE TEMPERATURE AT SAID COMBUSTIBLE MATERIAL TO ITS IGNITIOIN POINT WITH COMBUSTION TAKING PLACE WHILE THE OXIDIZABLE LIQUID IS IN LIQUID FORM.
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) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |