US2955988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for carbonizing coal in a laminar gas stream
Assignee: Individual
•
Filing: 1958-02-14
•
Granted: 1960-10-11
•
Expires: 1978-02-14
Abstract
No abstract record available.
Inventors
- 👤 John J S Sebastian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:47
CPC Classifications
C; C10; C10B; C10B49/00; C10B49/02; C10B49/04; C10B49/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A PROCESS FOR CARBONIZING COAL WHICH COMPRISES ENTRAINING FINELY DIVIDED COAL PARTICLES HAVING A MAXIMUM SIZE OF ABOUT 20 MESH IN A FLOWING GAS STREAM SUBSTANTIALLY FREE FROM OXYGEN AND COMPRISING SUPERHEATED STEAM AS AN ESSENTIAL COMPONENT, PASSING SAID COAL-ENTRAINING GASEOUS STREAM IN SUBSTANTIALLY LAMINAR FLOW THROUGH A CARBONIZATION ZONE, THE MAXIMUM TEMPERATURE IN SAID ZONE BEING ABOUT 1500*F., THE MAXIMUM PRESSURE IN SAID ZONE BEING ABOUT 100 P.S.I.G., THE MAXIMUM GAS STREAM VELOCITY BEING ABOUT 8 FEET PER SECOND AND THE MAXIMUM DIAMETER OF SAID ZONE IN THE PLANE NORMAL TO THE DIRECTION OF GAS FLOW BEING ABOUT 8 INCHES, SAID ENTRAINING GAS BEING SUBSTANTIALLY NON-OXIDENT AT SAID TEMPERATURES AND SERVING TO HEAT SAID COAL PARTICLES BY DIRECT HEAT TRANSFER.
Claim 2
Dependent Claim
121 words
A PROCESS FOR CARBONIZING COAL WHICH COMPRISES ENTRAINING FINELY DIVIDED COAL PARTICLES HAVING A MAXIMUM SIZE OF ABOUT 20 MESH IN A FLOWING GAS STREAM SUBSTANTIALLY FREE FROM OXYGEN AND COMPRISING SUPERHEATED STEAM AS AN ESSENTIAL COMPONENT, PASSING SAID COAL-ENTRAINING GASEOUS STREAM IN SUBSTANTIALLY LAMINAR FLOW THROUGH A CARBONIZATION ZONE, THE MAXIMUM TEMPERATURE IN SAID ZONE BEING ABOUT 1500*F., THE MAXIMUM PRESSURE IN SAID ZONE BEING ABOUT 100 P.S.I.G., THE MAXIMUM GAS STREAM VELOCITY BEING ABOUT 8 FEET PER SECOND AND THE MAXIMUM DIAMETER OF SAID ZONE IN THE PLANE NORMAL TO THE DIRECTION OF GAS FLOW BEING ABOUT 8 INCHES, SAID ENTRAINING GAS BEING SUBSTANTIALLY NON-OXIDENT AT SAID TEMPERATURES AND SERVING TO HEAT SAID COAL PARTICLES BY DIRECT HEAT TRANSFER.
References Cited (Backward Citations)
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US2285276A
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US2590219A
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US2662007A
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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) | 1963-10-11 | 1964-04-11 | 1964-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-11 | 1968-04-11 | 1968-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-11 | 1972-04-11 | 1972-10-11 | $7700.00 | Window Closed / Lapsed |