Patent US3316155A successfully refreshed from Google Patents.
US3316155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coking process
Assignee: Inland Steel Co
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Filing: 1963-01-25
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Granted: 1967-04-25
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Expires: 1983-01-25
Abstract
No abstract record available.
Inventors
- 👤 Michael O Holowaty
- 👤 Charles R Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:42
CPC Classifications
C; C10; C10B; C10B53/00; C10B53/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
A PROCESS OF PRODUCING METALLURGICAL COKE BRIQUETTES FROM 100% ILLINOIS TYPE COAL WHICH COMPRISES; PREHEATING 100% ILLINOIS TYPE COAL IN A FINELY DIVIDED FORM TO INCIPIENT FLUIDITY WITHOUT EFFECTING VOLATILIZATION OF THE COAL HAVING A PARTICLE SIZE LESS THAN -- 10 MESH SIZE WITH AT LEAST 90% BEING LESS THAN -20 MESH, FORMING BRIQUETTES OF SAID COAL BY APPLYING SIMULTANEOUSLY PRESSURE AND HEAT TO SAID COAL WHILE THE COAL REMAINS AT SAID INCIPIENT FLUIDITY, SAID HEAT APPLIED DURING BRIQUETTING BEING SUFFICIENT TO FORM A THIN SHELL OF COKE ABOUT THE ENTIRE SURFACE OF SAID BRIQUETTES WITHOUT SIGNIFICANTLY REDUCING THE VOLATILE MATTER CONTENT OF SAID BRIQUETTES AT A RATE OF BETWEEN ABOUT 1.5*F AND 3.5*F. PER MINUTE, AND GRADUALLY HEATING SAID BRIQUETTES THROUGH THE PLASTIC STAGE SUCH THAT AT LEAST A PORTION OF THE VOLATILE MATTER RELEASED BY SAID COAL IS RETAINED WITHIN THE SAID BRIQUETTES AND SUPPLIED THE ENTIRE BINDING AGENT REQUIRED FOR SAID BRIQUETTES, AND CONTINUING SAID HEATING ABOVE THE CARBONIZATION TEMPERATURE OF SAID COAL TO FORM METALLURGICAL COKE
Claim 2
Dependent Claim
170 words
A PROCESS OF PRODUCING METALLURGICAL COKE BRIQUETTES FROM 100% ILLINOIS TYPE COAL WHICH COMPRISES; PREHEATING 100% ILLINOIS TYPE COAL IN A FINELY DIVIDED FORM TO INCIPIENT FLUIDITY WITHOUT EFFECTING VOLATILIZATION OF THE COAL HAVING A PARTICLE SIZE LESS THAN -- 10 MESH SIZE WITH AT LEAST 90% BEING LESS THAN -20 MESH, FORMING BRIQUETTES OF SAID COAL BY APPLYING SIMULTANEOUSLY PRESSURE AND HEAT TO SAID COAL WHILE THE COAL REMAINS AT SAID INCIPIENT FLUIDITY, SAID HEAT APPLIED DURING BRIQUETTING BEING SUFFICIENT TO FORM A THIN SHELL OF COKE ABOUT THE ENTIRE SURFACE OF SAID BRIQUETTES WITHOUT SIGNIFICANTLY REDUCING THE VOLATILE MATTER CONTENT OF SAID BRIQUETTES AT A RATE OF BETWEEN ABOUT 1.5*F AND 3.5*F. PER MINUTE, AND GRADUALLY HEATING SAID BRIQUETTES THROUGH THE PLASTIC STAGE SUCH THAT AT LEAST A PORTION OF THE VOLATILE MATTER RELEASED BY SAID COAL IS RETAINED WITHIN THE SAID BRIQUETTES AND SUPPLIED THE ENTIRE BINDING AGENT REQUIRED FOR SAID BRIQUETTES, AND CONTINUING SAID HEATING ABOVE THE CARBONIZATION TEMPERATURE OF SAID COAL TO FORM METALLURGICAL COKE
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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) | 1970-04-24 | 1970-10-24 | 1971-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-24 | 1974-10-24 | 1975-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-24 | 1978-10-24 | 1979-04-25 | $7700.00 | Window Closed / Lapsed |