Patent US3318447A successfully refreshed from Google Patents.
US3318447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of high and low quality electrode cokes
Assignee: Marathon Oil Co
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Filing: 1964-02-03
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Granted: 1967-05-09
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Expires: 1984-02-03
Abstract
No abstract record available.
Inventors
- 👤 Jr John L Ellingboe
- 👤 John H Runnels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:25
CPC Classifications
B; B03; B03C; B03C1/00; B03C1/02; B03C1/035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A METHOD FOR RECOVERING PETROLEUM COKE HAVING A RELATIVELY LOWER COEFFICIENT OF THERMAL EXPANSION FROM AN INITIAL MASS OF PETROLEUM COKE COMPRISING: SUBJECTING A CONTINUOUS STREAM OF FINELY DIVIDED PARTICLES OF SAID INITIAL MASS OF PETROLEUM COKE TO A HIGH INTENSITY MAGNETIC FIELD, AND SEPARATING THOSE PARTICLES OF PETROLEUM COKE WHICH ARE ATTRACTED BY SAID MAGNETIC FIELD AND WHICH ARE CHAR-
Claim 2
Independent Claim
61 words
A METHOD FOR RECOVERING PETROLEUM COKE HAVING A RELATIVELY LOWER COEFFICIENT OF THERMAL EXPANSION FROM AN INITIAL MASS OF PETROLEUM COKE COMPRISING: SUBJECTING A CONTINUOUS STREAM OF FINELY DIVIDED PARTICLES OF SAID INITIAL MASS OF PETROLEUM COKE TO A HIGH INTENSITY MAGNETIC FIELD, AND SEPARATING THOSE PARTICLES OF PETROLEUM COKE WHICH ARE ATTRACTED BY SAID MAGNETIC FIELD AND WHICH ARE CHAR-
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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) | 1970-05-08 | 1970-11-07 | 1971-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-08 | 1974-11-07 | 1975-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-08 | 1978-11-07 | 1979-05-09 | $7700.00 | Window Closed / Lapsed |