Patent US2623843A successfully refreshed from Google Patents.
US2623843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refining of liquid or semiliquid carbonaceous materials
Assignee: Standard Oil Development Co
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Filing: 1949-08-31
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Granted: 1952-12-30
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Expires: 1969-08-31
Abstract
No abstract record available.
Inventors
- 👤 Gerald E Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:57
CPC Classifications
C; C10; C10B; C10B55/00; C10B55/02; C10B53/00; C10B53/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
THE METHOD WHICH COMPRISES MIXING SHALE OIL CONTAINING A SUBSTANTIAL PORTION BOILING ABOVE 700* F. WITH SPENT UNBURNT COLORADO OIL SHALE FINES CONTAINING UP TO 12% OF BURNABLE CARBONACEOUS MATERIAL AND HAVING A PARTICLE SIZE DISTRIBUTION RANGE SUBSTANTIALLY BELOW 40 MICRONS, IN A RATIO OF 2 TO 20 POUNDS OF THE SPENT SHALE FINES PER GALLONN OF THE OIL, AND COKING THE RESULTING MIXTURE AT COKING TEMPERATURES BETWEEN ABOUT 700 AND 1100* F. TO DRIVE OFF DISTILLATE OIL AND CONVERT THE RESIDUE TO COKE.
Claim 2
Independent Claim
84 words
THE METHOD WHICH COMPRISES MIXING SHALE OIL CONTAINING A SUBSTANTIAL PORTION BOILING ABOVE 700* F. WITH SPENT UNBURNT COLORADO OIL SHALE FINES CONTAINING UP TO 12% OF BURNABLE CARBONACEOUS MATERIAL AND HAVING A PARTICLE SIZE DISTRIBUTION RANGE SUBSTANTIALLY BELOW 40 MICRONS, IN A RATIO OF 2 TO 20 POUNDS OF THE SPENT SHALE FINES PER GALLONN OF THE OIL, AND COKING THE RESULTING MIXTURE AT COKING TEMPERATURES BETWEEN ABOUT 700 AND 1100* F. TO DRIVE OFF DISTILLATE OIL AND CONVERT THE RESIDUE TO COKE.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-30 | 1956-06-30 | 1956-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-30 | 1960-06-30 | 1960-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-30 | 1964-06-30 | 1964-12-30 | $7700.00 | Window Closed / Lapsed |