US2665238A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of oil from shale
Assignee: Texaco Inc
•
Filing: 1951-07-12
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Granted: 1954-01-05
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Expires: 1971-07-12
Abstract
No abstract record available.
Inventors
- 👤 James K Truitt
- 👤 George B Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:02
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
THE METHOD OF RECOVERING OIL FROM OIL SHALE CONTAINING KEROGEN THAT COMPRISES CHARGING TO A RETORT FEED MATERIALS CONSISTING OF THE SHALE AND WATER IN LARGE AMOUNT APPROXIMATING THE WEIGHT OF THE SHALE AND SUBJECTING THE MATERIAL IN THE RETORT TO A TEMPERATURE IN EXCESS OF 500* F. UNDER A PRESSURE IN EXCESS OF 1000 LBS. PER SQUARE INCH TO THEREBY EFFECT THE DECOMPOSITION OF THE KEROGEN AND RESULTANT FORMATION OF OIL.
Claim 2
Independent Claim
72 words
THE METHOD OF RECOVERING OIL FROM OIL SHALE CONTAINING KEROGEN THAT COMPRISES CHARGING TO A RETORT FEED MATERIALS CONSISTING OF THE SHALE AND WATER IN LARGE AMOUNT APPROXIMATING THE WEIGHT OF THE SHALE AND SUBJECTING THE MATERIAL IN THE RETORT TO A TEMPERATURE IN EXCESS OF 500* F. UNDER A PRESSURE IN EXCESS OF 1000 LBS. PER SQUARE INCH TO THEREBY EFFECT THE DECOMPOSITION OF THE KEROGEN AND RESULTANT FORMATION OF OIL.
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) | 1957-01-04 | 1957-07-06 | 1958-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-04 | 1961-07-06 | 1962-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-04 | 1965-07-06 | 1966-01-05 | $7700.00 | Window Closed / Lapsed |