Patent US606681A successfully refreshed from Google Patents.
Patent US2750276A successfully refreshed from Google Patents.
US2750276A
Expired / Lapsed
US
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Method and apparatus for smelting fine iron ore
Assignee: Armco Inc
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Filing: 1952-01-04
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Granted: 1956-06-12
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Expires: 1972-01-04
Abstract
No abstract record available.
Inventors
- 👤 William E Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:25
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/02; C22B1/10; C21; C21B; C21B13/00; C21B13/14; C21B13/143; C21B2100/00; C21B2100/40; C21B2100/44; C21B2100/60; C21B2100/66; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134; Y02P10/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
IN A PROCESS OF REDUCING AND SMELTING IRON ORE INCLUDING THE STEPS OF PRODUCING IN A FURNACE WITH A MOBILE FUEL A FLAME HAVING A TEMPERATURE OF AT LEAST SUBSTANTIALLY 3000* F. THE PRODUCTS OF COMBUSTION OF WHICH ARE REDUCING TO IRON OXIDE, EMPLOYING SAID REDUCING PRODUCTS OF COMBUSTION IN HEATED CONDITION TO REDUCE FINELY DIVIDED IRON ORE TO IRON, AND MELTING SAID REDUCED IRON BY MEANS OF THE HEAT OF SAID FLAME, THE FURTHER STEPS OF CRACKING SAID MOBILE FUEL PRIOR TO IGNITION THEREOF TO PRODUCE SAID FLAME BY THE APPLICATION OF HEAT TO SAID MOBILE FUEL, AND HAVING PRESENT IN SAID FUEL AT THE TIME OF CRACKING A FINELY DIVIDED MATERIAL WHICH IS INTRODUCED INTO SAID FURNACE THROUGH SAID FLAME.
Claim 2
Dependent Claim
122 words
IN A PROCESS OF REDUCING AND SMELTING IRON ORE INCLUDING THE STEPS OF PRODUCING IN A FURNACE WITH A MOBILE FUEL A FLAME HAVING A TEMPERATURE OF AT LEAST SUBSTANTIALLY 3000* F. THE PRODUCTS OF COMBUSTION OF WHICH ARE REDUCING TO IRON OXIDE, EMPLOYING SAID REDUCING PRODUCTS OF COMBUSTION IN HEATED CONDITION TO REDUCE FINELY DIVIDED IRON ORE TO IRON, AND MELTING SAID REDUCED IRON BY MEANS OF THE HEAT OF SAID FLAME, THE FURTHER STEPS OF CRACKING SAID MOBILE FUEL PRIOR TO IGNITION THEREOF TO PRODUCE SAID FLAME BY THE APPLICATION OF HEAT TO SAID MOBILE FUEL, AND HAVING PRESENT IN SAID FUEL AT THE TIME OF CRACKING A FINELY DIVIDED MATERIAL WHICH IS INTRODUCED INTO SAID FURNACE THROUGH SAID FLAME.
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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) | 1959-06-12 | 1959-12-12 | 1960-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-12 | 1963-12-12 | 1964-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-12 | 1967-12-12 | 1968-06-12 | $7700.00 | Window Closed / Lapsed |