Patent US3125437A successfully refreshed from Google Patents.
US3125437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of briquetting iron ores
Assignee: —
•
Filing: —
•
Granted: 1964-03-17
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Expires: 1981-03-17
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:32
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
THE PROCESS FOR THE BENEFICIATION OF HEMATITE ORE FINES COMPRISING HEATING AND PARTIALLY REDUCING SAID ORE FINES AT TEMPERATURES BELOW 1500*F. IN THE PRESENCE OF A SUITABLE REDUCTANT TO PROVIDE SYNTHETIC MAGNETITE FINES, AND PRESSING SAID FINES WITH CONTACTING PARTIALLY REDUCED INTERFACES INTO BRIQUETTES AT PRESSURES BETWEEN 10,000 AND 80,000 P.S.I. AND TEMPERATURES BETWEEN 700* AND 1300*F.
Claim 2
Dependent Claim
57 words
THE PROCESS FOR THE BENEFICIATION OF HEMATITE ORE FINES COMPRISING HEATING AND PARTIALLY REDUCING SAID ORE FINES AT TEMPERATURES BELOW 1500*F. IN THE PRESENCE OF A SUITABLE REDUCTANT TO PROVIDE SYNTHETIC MAGNETITE FINES, AND PRESSING SAID FINES WITH CONTACTING PARTIALLY REDUCED INTERFACES INTO BRIQUETTES AT PRESSURES BETWEEN 10,000 AND 80,000 P.S.I. AND TEMPERATURES BETWEEN 700* AND 1300*F.
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) | 1967-03-17 | 1967-09-16 | 1968-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-17 | 1971-09-16 | 1972-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-17 | 1975-09-16 | 1976-03-17 | $7700.00 | Window Closed / Lapsed |