US3883399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Charging coke oven blended coal and an overlay of briquettes
Assignee: Nippon Steel Corp
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Filing: 1972-06-14
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Granted: 1975-05-13
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Expires: 1992-06-14
Abstract
Abstract This specification discloses a carbonization method of coal briquette which made from non-coking coal and poor coking coal. According to this method, a formed coke for blast furnace can be produced economically by using conventional coke oven.
Inventors
- 👤 Naomichi Nire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:30
CPC Classifications
C; C10; C10B; C10B53/00; C10B53/08; C10B57/00; C10B57/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A METHOD FOR CARBONIZING COAL BRIQUETTES UTILIZING A CONVENTIONAL COKING OVEN COMPRISING: CHARGING SAID OVEN WITH A SUFFICIENT AMOUNT OF A BLENDED COAL TO FILL THE OVEN TO A LEVEL WITHIN THE RANGE OF BETWEEN 70 AND 94 PERCENT OF THE EFFECTIVE HEIGHT OF THE OVEN, SAID BLENDED COAL BEING CAPABLE OF CONVERSION INTO BLAST FURNACE COKE UPON CARBONIZATION THEREOF, THEREAFTER PLACING ON TOP OF SAID BLENDED COAL, A SUFFICIENT AMOUNT OF COAL BRIQUETTES TO FILL THE REMAINDER OF THE EFFECTIVE HEIGHT OF THE OVEN, SAID BRIQUETES COMPRISING AN ADMIXTURE OF A SOFT COKING COAL AND A NON-COKING CARBONACEOUS SUBSTANCE, AND SUBJECTING THE CONTENTS OF THE OVEN TO CARBONIZATION TO THEREBY SIMULTANEOUSLY PRODUCE BLAST FURNACE COKE AND COKE BRIQUETTES.
Claim 2
Independent Claim
119 words
A METHOD FOR CARBONIZING COAL BRIQUETTES UTILIZING A CONVENTIONAL COKING OVEN COMPRISING: CHARGING SAID OVEN WITH A SUFFICIENT AMOUNT OF A BLENDED COAL TO FILL THE OVEN TO A LEVEL WITHIN THE RANGE OF BETWEEN 70 AND 94 PERCENT OF THE EFFECTIVE HEIGHT OF THE OVEN, SAID BLENDED COAL BEING CAPABLE OF CONVERSION INTO BLAST FURNACE COKE UPON CARBONIZATION THEREOF, THEREAFTER PLACING ON TOP OF SAID BLENDED COAL, A SUFFICIENT AMOUNT OF COAL BRIQUETTES TO FILL THE REMAINDER OF THE EFFECTIVE HEIGHT OF THE OVEN, SAID BRIQUETES COMPRISING AN ADMIXTURE OF A SOFT COKING COAL AND A NON-COKING CARBONACEOUS SUBSTANCE, AND SUBJECTING THE CONTENTS OF THE OVEN TO CARBONIZATION TO THEREBY SIMULTANEOUSLY PRODUCE BLAST FURNACE COKE AND COKE BRIQUETTES.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |