Patent US2694035A successfully refreshed from Google Patents.
US2694035A
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Distillation of oil-bearing minerals in two stages in the presence of hydrogen
Assignee: Standard Oil Development Co
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Filing: 1949-12-23
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Granted: 1954-11-09
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Expires: 1969-12-23
Abstract
No abstract record available.
Inventors
- 👤 Lloyd B Smith
- 👤 Mason Ralph Burgess
- 👤 Forrest H Blanding
- 👤 Charles E Hemminger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:35
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/006; C10G1/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
THE PROCESS OF PRODUCING OIL FROM SUBDIVIDED OIL SHALE WHICH COMPRISES FIRST SOAKING SAID SHALE AT 650* TO 750* F. IN A GAS CONTAINING SUBSTANTIAL PROPORTION OF HYDROGEN, AMOUNTING TO 6000 TO 10,000 CUBIC FEET OF HYDROGEN UNDER STANDARD CONDITIONS PER TON OF SHALE, FOR A PERIOD OF ABOUT 5 TO 15 HOURS TO OBTAIN INCIPIENT PRODUCTION OF OIL, AND THEREAFTER RETORTING SAID HYDROGEN TREATED SHALE ALSO IN PRESENCE OF HYDROGEN, AT A TEMPERATURE OF 800* TO 950* F. FOR A FURTHER PERIOD OF 1 TO 5 HOURS, TO OBTAIN A SUBSTANTIALLY GREATER TOTAL OIL PRODUCTION FROM SAID SHALE THAN IS OBTAINED BY THE STANDARD FISCHER ASSAY, BOTH SAID SOAKING AND SAID RETORTING BEING CONDUCTED UNDER ELEVATED PRESSURE BELOW ABOUT 1000 P. S. I. G.
Claim 2
Dependent Claim
125 words
THE PROCESS OF PRODUCING OIL FROM SUBDIVIDED OIL SHALE WHICH COMPRISES FIRST SOAKING SAID SHALE AT 650* TO 750* F. IN A GAS CONTAINING SUBSTANTIAL PROPORTION OF HYDROGEN, AMOUNTING TO 6000 TO 10,000 CUBIC FEET OF HYDROGEN UNDER STANDARD CONDITIONS PER TON OF SHALE, FOR A PERIOD OF ABOUT 5 TO 15 HOURS TO OBTAIN INCIPIENT PRODUCTION OF OIL, AND THEREAFTER RETORTING SAID HYDROGEN TREATED SHALE ALSO IN PRESENCE OF HYDROGEN, AT A TEMPERATURE OF 800* TO 950* F. FOR A FURTHER PERIOD OF 1 TO 5 HOURS, TO OBTAIN A SUBSTANTIALLY GREATER TOTAL OIL PRODUCTION FROM SAID SHALE THAN IS OBTAINED BY THE STANDARD FISCHER ASSAY, BOTH SAID SOAKING AND SAID RETORTING BEING CONDUCTED UNDER ELEVATED PRESSURE BELOW ABOUT 1000 P. S. I. G.
References Cited (Backward Citations)
US1343100A
Cited
US1890434A
Cited
GB315764A
Cited
US1984596A
Cited
US2480670A
Cited
US2464271A
Cited
US2406810A
Cited
US2397432A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-08 | 1958-05-10 | 1958-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-08 | 1962-05-10 | 1962-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-08 | 1966-05-10 | 1966-11-09 | $7700.00 | Window Closed / Lapsed |