US2704248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of separating ferrous metal from its gangue
Assignee: Madaras Corp
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Filing: 1949-11-07
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Granted: 1955-03-15
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Expires: 1969-11-07
Abstract
No abstract record available.
Inventors
- 👤 Julius D Madaras
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:57
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/04; C21B; C21B11/00; C21B11/02; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134; Y10; Y10S; Y10S266/00; Y10S266/90
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
92 words
A METHOD OF HEATING AND MELTING IRON ORE COMPRIING CHARGING THE SOLID IRON ORE INTO A REFRACTORY LINED GAS FURNACE PROVIDED WITH HEATING TUYERES, DIRECTING A REDUCEING FLAME FROM SAID TUYERES AGAINST SAID IRON ORE TO REDUCE AND PARTIALLY MELT THE SAME, CAUSING THE FLAME FROM SAID TUYERS TO BECOME OXIDIZING THEREBY PARTIALLY REOXIDIZING SAID IRON AND PRODUCING ADDITIONAL HEAT WITHIN THE FURNACE TO SAID IN COMPLETELY MELTING THE CHARGE, AND THEN MAKING THE FLAME FROM SAID TUYERES REDUCING AGAIN SO AS TO COMPLETE THE REDUCTION OF THE PARTIALLY OXIDIZED MOLTEN IRON.
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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) | 1958-03-14 | 1958-09-13 | 1959-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-14 | 1962-09-13 | 1963-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-14 | 1966-09-13 | 1967-03-15 | $7700.00 | Window Closed / Lapsed |