US2630306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Subterranean retorting of shales
Assignee: ExxonMobil Oil Corp
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Filing: 1952-01-03
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Granted: 1953-03-03
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Expires: 1972-01-03
Abstract
No abstract record available.
Inventors
- 👤 Louis P Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:29
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/243; C; C10; C10G; C10G1/00; C10G1/02; E21B43/30; E21B43/305
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A PROCESS FOR OBTAINING SHALE OIL FROM OIL SHALE STRATUM IN ITS NATURAL POSITION, COMPRISING DRIVING HORIZONTAL TUNNELS IMMEDIATELY ABOVE AND IMMEDIATELY BELOW SAID STRATUM, DRILLING A PLURALITY OF HOLES VERTICALLY THROUGH THE SEPARATING LAYER OF SHALE TO CONNECT SAID HORIZONTAL TUNNELS, POSITIONING A PLURALITY OF BAFFLES AT PREDETERMINED INTERVALS IN EACH OF THE HORIZONTAL TUNNELS TO PROVIDE INTERCONNECTING ALTERNATE ZONES OF UP AND DOWN FLOW THROUGH A SERIES OF THE VERTICALLY DRILLED HOLES BETWEEN SAID HORIZONTAL TUNNELS, INITIATING COMBUSTION OF SHALE IN THE FIRST OF SAID ZONES ADJACENT THE EXTERIOR OF SAID SHALE STRATUM, BLOWING A COMBUSION SUP-
Claim 2
Dependent Claim
99 words
A PROCESS FOR OBTAINING SHALE OIL FROM OIL SHALE STRATUM IN ITS NATURAL POSITION, COMPRISING DRIVING HORIZONTAL TUNNELS IMMEDIATELY ABOVE AND IMMEDIATELY BELOW SAID STRATUM, DRILLING A PLURALITY OF HOLES VERTICALLY THROUGH THE SEPARATING LAYER OF SHALE TO CONNECT SAID HORIZONTAL TUNNELS, POSITIONING A PLURALITY OF BAFFLES AT PREDETERMINED INTERVALS IN EACH OF THE HORIZONTAL TUNNELS TO PROVIDE INTERCONNECTING ALTERNATE ZONES OF UP AND DOWN FLOW THROUGH A SERIES OF THE VERTICALLY DRILLED HOLES BETWEEN SAID HORIZONTAL TUNNELS, INITIATING COMBUSTION OF SHALE IN THE FIRST OF SAID ZONES ADJACENT THE EXTERIOR OF SAID SHALE STRATUM, BLOWING A COMBUSION SUP-
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) | 1956-03-02 | 1956-09-01 | 1957-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-02 | 1960-09-01 | 1961-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-02 | 1964-09-01 | 1965-03-03 | $7700.00 | Window Closed / Lapsed |