Patent US3057715A successfully refreshed from Google Patents.
US3057715A
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Method and apparatus for cooling sinter
Assignee: United States Steel Corp
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Filing: 1959-06-30
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Granted: 1962-10-09
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Expires: 1979-06-30
Abstract
No abstract record available.
Inventors
- 👤 James M Stapleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:22
CPC Classifications
F; F27; F27D; F27D15/00; F27D15/02; F27D15/0206; F27D15/0266; C; C22; C22B; C22B1/00; C22B1/14; C22B1/16; C22B1/20; F27B; F27B21/00; F27B21/02; F27B21/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
133 words
IN A SINTERING PROCESS IN WHICH A BED OF IRON-BEARING SINTER FEED CONTAINING COMBUSTIBLE MATERIAL IS DEPOSITED ON A TRAVELING GRATE, THE COMBUSTIBLE MATERIAL IS IGNITED AT THE UPPER SURFACE OF THE BED, AND COMBUSTION AIR PASSES DOWNWARDLY THROUGH THE BED, SAID BED THUS INCLUDING A LAYER OF UNBURNED FEED ADJACENT THE GRATE, A COMBUSION ZONE OVERLYING THE UNBURNED FEED, AND A LAYER OF BURNED IRON OXIDE SINTER OVERLYING THE COMBUSTION ZONE, WHEREBY THE COMBUSTION AIR PASSES THROUGH THE BURNED SINTER BEFORE REACHING THE COMBUSTION ZONE, THE COMBINATION THEREWITH OF A METHOD OF CONTROLLING THE COLLING RATE OF THE BURNED SINTER THROUGHOUT A FULL RANGE FROM ITS FORMATION TEMPERATURE OF AT LEAST 2000 F. TO A HANDLING TEMPERATURE OF 300 TO 600 F., SAID METHOD COMPRISING PREHEATING THE COMBUSTION AIR BEFORE IT REACHES
References Cited (Backward Citations)
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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) | 1965-10-08 | 1966-04-09 | 1966-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-08 | 1970-04-09 | 1970-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-08 | 1974-04-09 | 1974-10-09 | $7700.00 | Window Closed / Lapsed |