Patent US3070515A successfully refreshed from Google Patents.
US3070515A
Expired / Lapsed
US
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Fluidized low temperature carbonization of caking bituminous coal
Assignee: Consolidation Coal Co
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Filing: 1957-05-06
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Granted: 1962-12-25
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Expires: 1977-05-06
Abstract
No abstract record available.
Inventors
- 👤 Nels E Sylvander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:54
CPC Classifications
C; C10; C10B; C10B49/00; C10B49/16; C10B49/20; C10B49/22; C10B49/02; C10B49/04; C10B49/08; C10B49/10; Y; Y02; Y02P; Y02P20/00; Y02P20/10; Y02P20/129
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
THE METHOD OF CARBONIZING A FINELY DIVIDED CAKING BITUMINOUS COAL WHICH COMPRISES PREHEATING THE COAL TO AND ELEVATED TEMPERATUER BELOW THE PLASTIC RANGE OF THE COAL IN A FLUIDIZED STATE, CONTACTING THE COAL WITH OXYGEN AT A TEMPERATURE BELOW THE PLASTIC RANGE OF THE COAL, PASSING THE COAL INTO A PREOXIDATION ZONE, MAINTAINING THE COAL IN A FLUIDIZED STATE BY MEANS OF AN OXYGEN-CONTAINING GAS THEREIN AT A TEMPERATURE WITHIN THE PLASTIC RANGE OF THE COAL, PASSING THE COAL AND GASES FROM SAID PREOXIDATION ZONE UPWARDLY WITHOUT DELIBERATE SEAPRATION INTO A CARBONIZATION ZONE, MAINTAINING THE COAL IN A FLUIDIZED STATE THEREIN AT A TEMPERATURE ABOVE THE PLASTIC RANGE OF THE COAL AND SEPARATELY RECOVERING FROM SAID CARBONIZATION ZONE COAL EVOLUTION VAPORS AND SOLID PARTICULATE CARBONIZATION RESIDUE.
Claim 2
Independent Claim
126 words
THE METHOD OF CARBONIZING A FINELY DIVIDED CAKING BITUMINOUS COAL WHICH COMPRISES PREHEATING THE COAL TO AND ELEVATED TEMPERATUER BELOW THE PLASTIC RANGE OF THE COAL IN A FLUIDIZED STATE, CONTACTING THE COAL WITH OXYGEN AT A TEMPERATURE BELOW THE PLASTIC RANGE OF THE COAL, PASSING THE COAL INTO A PREOXIDATION ZONE, MAINTAINING THE COAL IN A FLUIDIZED STATE BY MEANS OF AN OXYGEN-CONTAINING GAS THEREIN AT A TEMPERATURE WITHIN THE PLASTIC RANGE OF THE COAL, PASSING THE COAL AND GASES FROM SAID PREOXIDATION ZONE UPWARDLY WITHOUT DELIBERATE SEAPRATION INTO A CARBONIZATION ZONE, MAINTAINING THE COAL IN A FLUIDIZED STATE THEREIN AT A TEMPERATURE ABOVE THE PLASTIC RANGE OF THE COAL AND SEPARATELY RECOVERING FROM SAID CARBONIZATION ZONE COAL EVOLUTION VAPORS AND SOLID PARTICULATE CARBONIZATION RESIDUE.
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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) | 1965-12-24 | 1966-06-25 | 1966-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-24 | 1970-06-25 | 1970-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-24 | 1974-06-25 | 1974-12-25 | $7700.00 | Window Closed / Lapsed |