US2814588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of petroleum coke
Assignee: Pure Oil Co
•
Filing: 1956-05-10
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Granted: 1957-11-26
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Expires: 1976-05-10
Abstract
No abstract record available.
Inventors
- 👤 Le Roi E Hutchings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:08
CPC Classifications
C; C10; C10L; C10L9/00; C10L9/02; C10L9/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
THE METHOD OF DESULFURIZING PETROLEUM COKE CONTAINING ABOUT 3 WEIGHT PERCENT OF SULFUR WHICH COMPRISES SUBJECTING SAID COKE TO HYDROGENATION AT A TEMPERATURE BETWEEN ABOUT 900*F. TO 1050*F. IN THE PRESENCE OF AT LEAST ABOUT 10 WEIGHT PERCENT OF HYDROGEN PER UNIT WEIGTH OF SAID COKE AND MAINTAINING SAID REACTION AT A TEMPERATURE OF ABOUT 985*F. TO 1015*F FOR A PERIOD OF TIME RANGING FROM ABOUT2 HOURS TO 6.5 HOURS AT A PRESURE BETWEEN ABOUT 2000 P. S. I. G. TO 3000 P. S. I. G. DURING SAID RACTION AND RECOVERING A DESULFURIZED PETROLEUM COKE HAVING A SULFUR CONTENT OF ABOUT 1.3 WEIGHT PERCENT OF SULFUR OF LESS.
Claim 2
Independent Claim
108 words
THE METHOD OF DESULFURIZING PETROLEUM COKE CONTAINING ABOUT 3 WEIGHT PERCENT OF SULFUR WHICH COMPRISES SUBJECTING SAID COKE TO HYDROGENATION AT A TEMPERATURE BETWEEN ABOUT 900*F. TO 1050*F. IN THE PRESENCE OF AT LEAST ABOUT 10 WEIGHT PERCENT OF HYDROGEN PER UNIT WEIGTH OF SAID COKE AND MAINTAINING SAID REACTION AT A TEMPERATURE OF ABOUT 985*F. TO 1015*F FOR A PERIOD OF TIME RANGING FROM ABOUT2 HOURS TO 6.5 HOURS AT A PRESURE BETWEEN ABOUT 2000 P. S. I. G. TO 3000 P. S. I. G. DURING SAID RACTION AND RECOVERING A DESULFURIZED PETROLEUM COKE HAVING A SULFUR CONTENT OF ABOUT 1.3 WEIGHT PERCENT OF SULFUR OF LESS.
References Cited (Backward Citations)
US2726148A
Cited
US2743216A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-25 | 1961-05-27 | 1961-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-25 | 1965-05-27 | 1965-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-25 | 1969-05-27 | 1969-11-26 | $7700.00 | Window Closed / Lapsed |