US3556980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of water from bituminous emulsion
Assignee: Petro Canada Exploration Inc
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Filing: 1968-06-17
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Granted: 1971-01-19
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Expires: 1988-06-17
Abstract
Abstract BITUMINOIS EMULSION SUCH AS THAT PRODUCED IN THE HOT WATER PROCESS FOR RECOVERY OF BITUMEN FROM TAR SAND IS TREATED FOR REMOVAL OF WATER BY FIRST APPLYING SHEARING FORCE TO THE EMULSION TO COALESCE WATER AND THEN RECOVERING BITUMEN FROM THE COALESCED WATER. ENERGY IS PREFERABLY IMPARTED TO THE EMULSION BY SHEARING FORCES IN AMOUNTS BETWEEN ABOUT 500 AND ABOUT 4,000 FOOT POUNDS (FT.-LBS.) PER POUND OF BITUMEN IN THE EMULSION AND THE SHEARING FORCES MAY BE APPLIED IN VARIOUS WAYS SUCH AS PUMPING THE EMULSION THROUGH PIPES.
Inventors
- 👤 Lincoln Clark
- 👤 Victor P Kaminsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:59
CPC Classifications
C; C10; C10C; C10C1/00; C10C1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |