Patent US2031583A successfully refreshed from Google Patents.
Patent US2841375A successfully refreshed from Google Patents.
US2841375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for in-situ utilization of fuels by combustion
Assignee: Svenska Skifferolje AB
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Filing: 1954-03-03
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Granted: 1958-07-01
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Expires: 1974-03-03
Abstract
No abstract record available.
Inventors
- 👤 Salomonsson Gosta Joha Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:04
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
A METHOD FOR COMBUSTION IN SITU OF COMBUSTIBLE ORGANIC MATERIAL IN SUBTERRANEAN DEPOSITS PIERCED BY INLET AND OUTLET BOREHOLES WHICH COMPRISES INTRODUCING A COMBUSTION SUPPORTING GAS THROUGH AN INLET BOREHOLE TO SAID COMBUSTIBLE MATERIAL TO PRODUCE A COMBUSTION ZONE AND TO FORM HOT COMBUSTION PRODUCTS, PASSING THE PRODUCTS OF COMBUSTION THROUGH THE DEPOSIT TO HEAT ADJACENT ORGANIC MATERIAL TO FORM VALUABLE PRODUCTS INCLUDING GASES AND VAPORS, COLLECTING AND REMOVING SAID VALUABLE PRODUCTS INCLUDING GASES AND VAPORS SEPARATELY FROM SAID PRODUCTS OF COMBUSTION AT A FIRST OUTLET BOREHOLE WHICH IS LOCATED A DISTANCE FROM SAID COMBUSTION ZONE, COLLECTING AND REMOVING THE PRODUCTS OF COMBUSTION SEPARATELY FROM THE VALUABLE PRODUCTS AT A SECOND OUTLET BOREHOLE SAID SECOND OUTLET BOREHOLE BEING LOCATED BETWEEN SAID FIRST INLET BOREHOLE AND SAID FIRST OUTLET BOREHOLE, THE PRESSURES AT BOTH OF SAID FIRST AND SECOND OUTLET BOREHOLES BEING BELOW ATMOSPHERIC AND SUBSTANTIALLY EQUAL, AND BEING LOWER THAN PRESSURES AT SAID INLET BOREHOLE.
Claim 2
Independent Claim
155 words
A METHOD FOR COMBUSTION IN SITU OF COMBUSTIBLE ORGANIC MATERIAL IN SUBTERRANEAN DEPOSITS PIERCED BY INLET AND OUTLET BOREHOLES WHICH COMPRISES INTRODUCING A COMBUSTION SUPPORTING GAS THROUGH AN INLET BOREHOLE TO SAID COMBUSTIBLE MATERIAL TO PRODUCE A COMBUSTION ZONE AND TO FORM HOT COMBUSTION PRODUCTS, PASSING THE PRODUCTS OF COMBUSTION THROUGH THE DEPOSIT TO HEAT ADJACENT ORGANIC MATERIAL TO FORM VALUABLE PRODUCTS INCLUDING GASES AND VAPORS, COLLECTING AND REMOVING SAID VALUABLE PRODUCTS INCLUDING GASES AND VAPORS SEPARATELY FROM SAID PRODUCTS OF COMBUSTION AT A FIRST OUTLET BOREHOLE WHICH IS LOCATED A DISTANCE FROM SAID COMBUSTION ZONE, COLLECTING AND REMOVING THE PRODUCTS OF COMBUSTION SEPARATELY FROM THE VALUABLE PRODUCTS AT A SECOND OUTLET BOREHOLE SAID SECOND OUTLET BOREHOLE BEING LOCATED BETWEEN SAID FIRST INLET BOREHOLE AND SAID FIRST OUTLET BOREHOLE, THE PRESSURES AT BOTH OF SAID FIRST AND SECOND OUTLET BOREHOLES BEING BELOW ATMOSPHERIC AND SUBSTANTIALLY EQUAL, AND BEING LOWER THAN PRESSURES AT SAID INLET BOREHOLE.
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) | 1961-06-30 | 1961-12-30 | 1962-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-30 | 1965-12-30 | 1966-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-30 | 1969-12-30 | 1970-07-01 | $7700.00 | Window Closed / Lapsed |