Patent US3073751A successfully refreshed from Google Patents.
US3073751A
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Method of making formcoke
Assignee: Consolidation Coal Co
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Filing: 1960-08-01
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Granted: 1963-01-15
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Expires: 1980-08-01
Abstract
No abstract record available.
Inventors
- 👤 Gorin Everett
- 👤 Robert J Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:55
CPC Classifications
C; C10; C10B; C10B53/00; C10B53/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
THE METHOD OF MAKING FORMCOKE WHICH COMPRISES ESTABLISHING AND MAINTAINING A TUMBLING ZONE IN A RETORT, INTRODUCING FINELY DIVIDED CAKING BITUMINOUS COAL AND FINELY DIVIDED SOLID DISTILLATION RESIDUE OF COAL INTO SAID TUMBLING ZONE IN THE RELATIVE PROPORTIONS OF 35 TO 60 PARTS BY WEIGHT OF SAID CAKING BITUMINOUS COAL AND 40 TO 65 PARTS BY WEIGHT OF SAID DISTILLATION RESIDUE, MAINTAINING AT LEAST TEN PERCENT OF THE VOLUME OF SAID RETORT FILLED WITH SAID COAL AND RESIDUE, MAINTAINING THE TEMPERATURE OF SAID TUMBLING ZONE BETWEEN 750 AND 825* F., SUPPLYING SUBSTANTIALLY ALL THE HEAT REQUIRED TO MAINTAIN SAID TEMPERATURE AS SENSIBLE HEAT OF THE MATERIALS FED TO THE RETORT, TUMBLING SAID COAL AND RESIDUE IN SAID TUMBLING ZONE UNDER NON-OXIDATIVE CONDITIONS UNTIL AGGLOMERATES ARE FORMED, AND THEREAFTER CALCINING SAID AGGLOMERATES AT AN ELEVATED TEMPERATURE, WHEREBY PARTICULATE FORMCOKE OF GREAT STRENGTH IS PRODUCED.
Claim 2
Independent Claim
143 words
THE METHOD OF MAKING FORMCOKE WHICH COMPRISES ESTABLISHING AND MAINTAINING A TUMBLING ZONE IN A RETORT, INTRODUCING FINELY DIVIDED CAKING BITUMINOUS COAL AND FINELY DIVIDED SOLID DISTILLATION RESIDUE OF COAL INTO SAID TUMBLING ZONE IN THE RELATIVE PROPORTIONS OF 35 TO 60 PARTS BY WEIGHT OF SAID CAKING BITUMINOUS COAL AND 40 TO 65 PARTS BY WEIGHT OF SAID DISTILLATION RESIDUE, MAINTAINING AT LEAST TEN PERCENT OF THE VOLUME OF SAID RETORT FILLED WITH SAID COAL AND RESIDUE, MAINTAINING THE TEMPERATURE OF SAID TUMBLING ZONE BETWEEN 750 AND 825* F., SUPPLYING SUBSTANTIALLY ALL THE HEAT REQUIRED TO MAINTAIN SAID TEMPERATURE AS SENSIBLE HEAT OF THE MATERIALS FED TO THE RETORT, TUMBLING SAID COAL AND RESIDUE IN SAID TUMBLING ZONE UNDER NON-OXIDATIVE CONDITIONS UNTIL AGGLOMERATES ARE FORMED, AND THEREAFTER CALCINING SAID AGGLOMERATES AT AN ELEVATED TEMPERATURE, WHEREBY PARTICULATE FORMCOKE OF GREAT STRENGTH IS PRODUCED.
References Cited (Backward Citations)
US2788313A
Cited
US2736690A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-14 | 1966-07-16 | 1967-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-14 | 1970-07-16 | 1971-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-14 | 1974-07-16 | 1975-01-15 | $7700.00 | Window Closed / Lapsed |