US3271293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for stripping solids from bituminous sand
Assignee: Petro Canada Exploration Inc
•
Filing: 1963-05-03
•
Granted: 1966-09-06
•
Expires: 1983-05-03
Abstract
No abstract record available.
Inventors
- 👤 Clark Lincoln
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:37
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/14; B03D1/1412; B03D1/1443; B03D1/1456; B03D1/1481; B03D1/24; B03D1/245; C; C10; C10C; C10C3/00; C10C3/007; C10G; C10G1/00; C10G1/04; C10G1/047
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A PROCESS FOR SEPARATING BITUMEN FROM BITUMINOUS SAND SLURRY WHICH COMPRISES PASSING A BITUMINOUS SAND SLURRY INTO A BODY OF WATER, GUIDING MATERIAL IN SAID BITUMINOUS SAND INCLUDING BITUMEN HEAVIER THAN WATER DOWNWARDLY THROUGH A COLUMN OF WATER HAVING A DECREASED CROSS-SECTION, PASSING A FLOTATION GAS UPWARDLY THROUGH SAID COLUMN WITHIN THE AREA OF DECREASED CROSS-SECTION BELOW THE SLURRY ENTRANCE, SAID GAS RISING AND CONTACTING THE DOWNWARDLY FLOWING BITUMEN AND FLOATING A PORTION THEREOF UPWARDLY, ENTRAPPING THE RISING GAS AND BITUMEN IN A CONFINED AREA BELOW THE TOP OF THE WATER COLUMN, CONDUCTING THE EENTRAPPED GAS AND BITUMEN UPWARDLY ABOVE AND OUT OF CONTAACT WITH THE WATER IN SAID COLUMN AND PERMITTING THE GAS TO VENT THEREABOVE.
Claim 2
Dependent Claim
117 words
A PROCESS FOR SEPARATING BITUMEN FROM BITUMINOUS SAND SLURRY WHICH COMPRISES PASSING A BITUMINOUS SAND SLURRY INTO A BODY OF WATER, GUIDING MATERIAL IN SAID BITUMINOUS SAND INCLUDING BITUMEN HEAVIER THAN WATER DOWNWARDLY THROUGH A COLUMN OF WATER HAVING A DECREASED CROSS-SECTION, PASSING A FLOTATION GAS UPWARDLY THROUGH SAID COLUMN WITHIN THE AREA OF DECREASED CROSS-SECTION BELOW THE SLURRY ENTRANCE, SAID GAS RISING AND CONTACTING THE DOWNWARDLY FLOWING BITUMEN AND FLOATING A PORTION THEREOF UPWARDLY, ENTRAPPING THE RISING GAS AND BITUMEN IN A CONFINED AREA BELOW THE TOP OF THE WATER COLUMN, CONDUCTING THE EENTRAPPED GAS AND BITUMEN UPWARDLY ABOVE AND OUT OF CONTAACT WITH THE WATER IN SAID COLUMN AND PERMITTING THE GAS TO VENT THEREABOVE.
References Cited (Backward Citations)
CA448231A
Cited
US1497607A
Cited
US1732893A
Cited
US2297586A
Cited
US2924566A
Cited
US2965557A
Cited
US3152979A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |