Patent US3274097A successfully refreshed from Google Patents.
US3274097A
Expired / Lapsed
US
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Method and apparatus for controlling carbon crystallization
Assignee: Marathon Oil Co
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Filing: 1965-10-04
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Granted: 1966-09-20
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Expires: 1985-10-04
Abstract
No abstract record available.
Inventors
- 👤 James A Biehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:20
CPC Classifications
C; C10; C10B; C10B7/00; C01; C01B; C01B32/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A CONTINOUS PROCESS FOR PRODUCING COKE HAVING A HIGH INDEX OF GRAPHITIC CRYSTALLINITY, WHICH COMPRISES TREATING A RESIDUUM OBTAINED FROM FRACTIONATION OF CRUDE OIL WITHOUT AROMATIC ADDITION BY PREHEATING IN A FURNACE TO A MAXIMUM TEMPERATURE OF ABOUT 920*F., CONTINUOUSLY INTRODUCING THE PREHEATED LIQUID AT A REDUCED TEMPERATURE OF ABOUT 890*F. IN A THIN STREAM ONTO THE TOP OF A MOVING COKING SURFACE IN A COKING VESSEL MAINTAINED AT NEAR ATMOSPHERIC PRESSURE, MOVING CARBON COKE IN A THIN LAYER OUT OF CONTACT WITH SAID STREAM IMMEDIATELY AFTER IT IS FORMED ON SAID SURFACE SO AS TO PREVENT DEPOSIT OF ADDITIONAL LIQUID THEREON, AND DISCHARGING THE FORMED CARBON COKE FROM THE COKING SURFACE INTO A STORAGE AREA IN THE COKING VESSEL MAINTAINED OUT OF CONTACT WITH SAID ENTERING STREAM.
Claim 2
Dependent Claim
128 words
A CONTINOUS PROCESS FOR PRODUCING COKE HAVING A HIGH INDEX OF GRAPHITIC CRYSTALLINITY, WHICH COMPRISES TREATING A RESIDUUM OBTAINED FROM FRACTIONATION OF CRUDE OIL WITHOUT AROMATIC ADDITION BY PREHEATING IN A FURNACE TO A MAXIMUM TEMPERATURE OF ABOUT 920*F., CONTINUOUSLY INTRODUCING THE PREHEATED LIQUID AT A REDUCED TEMPERATURE OF ABOUT 890*F. IN A THIN STREAM ONTO THE TOP OF A MOVING COKING SURFACE IN A COKING VESSEL MAINTAINED AT NEAR ATMOSPHERIC PRESSURE, MOVING CARBON COKE IN A THIN LAYER OUT OF CONTACT WITH SAID STREAM IMMEDIATELY AFTER IT IS FORMED ON SAID SURFACE SO AS TO PREVENT DEPOSIT OF ADDITIONAL LIQUID THEREON, AND DISCHARGING THE FORMED CARBON COKE FROM THE COKING SURFACE INTO A STORAGE AREA IN THE COKING VESSEL MAINTAINED OUT OF CONTACT WITH SAID ENTERING STREAM.
References Cited (Backward Citations)
US2697069A
Cited
US2922755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |