Patent US3558469A successfully refreshed from Google Patents.
US3558469A
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Hot water process
Assignee: Great Canadian Oil Sands Ltd
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Filing: 1968-07-09
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Granted: 1971-01-26
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Expires: 1988-07-09
Abstract
Abstract THE SPECIFICATION DISCLOSES A METHOD OF DETERMINING THE PROCESSABILITY OF BITUMINOUS TAR SANDS AND REGULATING THE AMOUNT OF WATER MIXED WITH TAR SANDS IN A HOT WATER PROCESS ACCORDING TO THE DETERMINED EASE OF PROCESSABILITY OF THE SANDS. BY THE INVENTION THE ALUMINUM CONTENT OF THE SANDS IS DETERMINED AND RELATED TO THE CLAY CONTENT OF THE SANDS. THE SANDS CLAY CONTENT IS USED AS A VARIABLE FOR DETERMINING THE AMOUNT OF WATER AND REAGENT TO BE MIXED WITH THE SANDS IN THE HOT WATER PROCESS.
Inventors
- 👤 Chester N White
- 👤 Junior West Loveland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:48
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/04; C10G1/047; C10C; C10C3/00; C10C3/007; C10G1/008; Y; Y10; Y10T; Y10T436/00; Y10T436/12
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |