US3152979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the efficient removal of oil from tar sands
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1961-09-07
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Granted: 1964-10-13
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Expires: 1981-09-07
Abstract
No abstract record available.
Inventors
- 👤 John A Bichard
- 👤 Roger M Butler
- 👤 John R Mceachern
- 👤 James W Wunder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:33
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/04; C10G1/047
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
IMPROVED PROCESS FOR SEGREGATING BITUMEN FROM BITUMEN TAR SANDS WHICH COMRPRISES MIXIGN WATER WITH SAID BITUMEN TAR SANDS IN AN INITIAL ZONE AT A TEMEPERATURE IN THE RANGE FROM ABOUT 32 TO ABOUT 110*F. SUBJECTING THE MIXTURE TO A MIXING-SHEARING ACTION IN SAID INITIAL ZONE, THEREAFTER INTRODUCING THE MIXTURE AT THE TOP OF A VSHAPED SECONDARY ZONE AND CAUSING THE MIXTURE TO FLOW DOWNWARDLY IN SAID V-SHAPED SECONDARY ZOE MAINTAINED AT A TEMPERATURE IN THE RANGE FROM ABOUT 32 TO ABOUT 110*F., INJECTING AIR AT A PLURALITY OF POINTS NEAR THE BOTTOM OF SAID SECONDARY ZONE, ALSO INTRODUCING ADDITIONAL WATER INTO SAID SECONDARY ZONE AT A PLURALITY OF POINTS BETWEEN THE POINT OF INTRODUCTION OF SAID AIR AND SAID MIXTURE, WITHDRAWING WATER AND SUBSTANTIALLY OILFREE SANDS FROM THE BOTTOM OF SAID SECONDARY ZONE AND WITHDRAWING SEPARATED BITUMEN FROM THE TOP OF SAID SECONDARY ZONE.
Claim 2
Dependent Claim
144 words
IMPROVED PROCESS FOR SEGREGATING BITUMEN FROM BITUMEN TAR SANDS WHICH COMRPRISES MIXIGN WATER WITH SAID BITUMEN TAR SANDS IN AN INITIAL ZONE AT A TEMEPERATURE IN THE RANGE FROM ABOUT 32 TO ABOUT 110*F. SUBJECTING THE MIXTURE TO A MIXING-SHEARING ACTION IN SAID INITIAL ZONE, THEREAFTER INTRODUCING THE MIXTURE AT THE TOP OF A VSHAPED SECONDARY ZONE AND CAUSING THE MIXTURE TO FLOW DOWNWARDLY IN SAID V-SHAPED SECONDARY ZOE MAINTAINED AT A TEMPERATURE IN THE RANGE FROM ABOUT 32 TO ABOUT 110*F., INJECTING AIR AT A PLURALITY OF POINTS NEAR THE BOTTOM OF SAID SECONDARY ZONE, ALSO INTRODUCING ADDITIONAL WATER INTO SAID SECONDARY ZONE AT A PLURALITY OF POINTS BETWEEN THE POINT OF INTRODUCTION OF SAID AIR AND SAID MIXTURE, WITHDRAWING WATER AND SUBSTANTIALLY OILFREE SANDS FROM THE BOTTOM OF SAID SECONDARY ZONE AND WITHDRAWING SEPARATED BITUMEN FROM THE TOP OF SAID SECONDARY ZONE.
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) | 1967-10-13 | 1968-04-13 | 1968-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-13 | 1972-04-13 | 1972-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-13 | 1976-04-13 | 1976-10-13 | $7700.00 | Window Closed / Lapsed |