Patent US2780536A successfully refreshed from Google Patents.
US2780536A
Expired / Lapsed
US
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Flue-dust sinter and method of manufacture
Assignee: United States Steel Corp
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Filing: 1953-10-21
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Granted: 1957-02-05
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Expires: 1973-10-21
Abstract
No abstract record available.
Inventors
- 👤 Dennis J Carney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:45
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/16; C22B1/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
IN A METHOD OF SINTERING MATERIALS CONTAINING IRON OXIDE SUCH AS FLUE DUST, IRON ORE AND SINTER FINES, THE STEPS INCLUDING MIXING ABOUT 5% IRON ORE, ABOUT 10% SINTER FINES, ABOUT 77% FLUE DUST AND ABOUT 8% FURNACE SLAG IN PARTICULATE FORM, SPREADING THE MIX ON A CONTINUOUS TRAVELING GRATE, AND PROGRESSIVELY IGNITING THE COMBUSTIBLE IN THE MIX AND EFFECTING COMBUSTION THEREOF WHILE TRAVELING ON THE GRATE.
Claim 2
Dependent Claim
67 words
IN A METHOD OF SINTERING MATERIALS CONTAINING IRON OXIDE SUCH AS FLUE DUST, IRON ORE AND SINTER FINES, THE STEPS INCLUDING MIXING ABOUT 5% IRON ORE, ABOUT 10% SINTER FINES, ABOUT 77% FLUE DUST AND ABOUT 8% FURNACE SLAG IN PARTICULATE FORM, SPREADING THE MIX ON A CONTINUOUS TRAVELING GRATE, AND PROGRESSIVELY IGNITING THE COMBUSTIBLE IN THE MIX AND EFFECTING COMBUSTION THEREOF WHILE TRAVELING ON THE GRATE.
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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) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |