Patent US2951633A successfully refreshed from Google Patents.
US3130133A
Expired / Lapsed
US
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Process for desulfurizing petroleum coke
Assignee: Harvey Aluminum Inc
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Filing: 1959-05-04
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Granted: 1964-04-21
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Expires: 1979-05-04
Abstract
No abstract record available.
Inventors
- 👤 Loevenstein Hirsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:22
CPC Classifications
C; C10; C10L; C10L9/00; C10L9/02; C10L9/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
66 words
A PROCESS FOR THE REMOVAL OF AT LEAST 60% OF SULFUR FROM PETROLEUM COKE HAVING A GRAIN SIZE OF -200 MESH, COMPRISING THE STEP OF SUBJECTING THE COKE TO THE ACTION OF HYDROGEN AT ATMOSPHERIC PRESSURE UNDER CONDITIONS OF TIME, TEMPERATURE, AND HYDROGEN QUANTITY SUCH THAT AT LEAST ABOUT 20% OF VOLATILES ARE MAINTAINED IN THE COKE UNTIL THE SAID AMOUNT OF HAS BEEN REMOVED THEREFROM.
References Cited (Backward Citations)
CA547040A
Cited
US2726148A
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US2717868A
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US2721169A
Cited
GB770830A
Cited
US2838386A
Cited
US2890993A
Cited
US2878163A
Cited
US2983673A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |