US3320152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid coking of tar sands
Assignee: Pullman Inc
•
Filing: 1965-06-01
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Granted: 1967-05-16
•
Expires: 1985-06-01
Abstract
No abstract record available.
Inventors
- 👤 Marvin F Nathan
- 👤 George T Skaperdas
- 👤 George C Grubb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:15
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
101 words
A METHOD OF RECOVERING HYDROCARBONS FORM TAR SANDS WHICH COMPRISES MAINTAINING A FIRST ZONE CONTAINING A SUPPORTED BED OF SOLID MATERIAL AT A TEMPERATURE BETWEEN ABOUT 250*F. AND ABOUT 600*F.; INTRODUCING TAR SAND AGGLOMERATES HAVING AN AVERAGE PARTICLE SIZE RANGING FROM ABOVE ABOUT 1/2 INCH TO ABOUT 4 INCHES INTO SAID ZONE, INTRODUCING RELATIVELY HOT CONTACT MATERIAL OBTAINED FROM A SECOND ZONE AS HEREINAFTER DEFINED AND ADMIXING SUCH CONTACT MATERIAL AND AGGLOMERATES IN SAID FIRST ZONE UNDER TEMPERATURE AND PRESSURE CONDITIONS TO REDUCE THE VISCOSITY OF THE HYDROCARBON AND DRIVE OFF WATER FROM THE AGGLOMERATES THEREBY PROVIDING A FLUIDIZABLE MIXTURE OF
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) | 1970-05-15 | 1970-11-14 | 1971-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-15 | 1974-11-14 | 1975-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-15 | 1978-11-14 | 1979-05-16 | $7700.00 | Window Closed / Lapsed |