Patent US2805142A successfully refreshed from Google Patents.
US2805142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the production of pure iron, and iron carbon alloys including carbon and alloy steel
Assignee: JAMES E BRASSERT
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Filing: 1954-02-09
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Granted: 1957-09-03
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Expires: 1974-02-09
Abstract
No abstract record available.
Inventors
- 👤 Arata Vincenzo Stefano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:03
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/12; C21B13/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
THE METHOD OF OPERATING A PLANT FOR THE PRODUCTION OF MOLTEN PURE IRON AND IRON CARBON ALLOYS FROM ORES, SAID PLANT BEING OF THE TYPE INCLUDING ONE OR MORE PLANT UNITS, EACH UNIT COMPRISING TWO OR MORE ELECTRIC FURNACES CONNECTED WITH EACH OTHER IN PARRALLEL WITH RESPECT TO THE IN-FLOW OF SOLID CHARGE MATERIAL AND THE OUT-FLOW OF EVOLVED GAS AND ONE OR MORE PREHEATING CHAMBERS CONNECTED IN SERIES WITH SAID FURNACES WITH RESPECT TO SAID FLOWS, IN WHICH THE CYCLE OF EACH INDIVIDUAL FURNACE INCLUDES A REDUCTION PERIOD DURING WHICH THE FLOW OF EVOLCED GASES FROM SAID FURNACE IS CONNECTED SO AS TO PREHEAT SOLID CHARGE MATERIALS CONTINOUSLY ENTERING SAID FURNACE FROM ONE OR MORE OF THE PREHEATING CHAMBERS BY CONTERCURRENT FLOW IN SUCH CHAMBER, A BATCH REFINING PERIOD DURING WHICH SAID FURNACE IS DISCONNECTED FROM THE REST OF THE UNIT WITH RESPECT TO THE FLOWS OF SOLID CHARGE MATERIALS AND EVOLVED GAS, AND A REPAIR PERIOD DURING WHICH SAID FURNACE IS CONDITIONED FOR THE SUCCEEDING CYCLE.
Claim 2
Independent Claim
168 words
THE METHOD OF OPERATING A PLANT FOR THE PRODUCTION OF MOLTEN PURE IRON AND IRON CARBON ALLOYS FROM ORES, SAID PLANT BEING OF THE TYPE INCLUDING ONE OR MORE PLANT UNITS, EACH UNIT COMPRISING TWO OR MORE ELECTRIC FURNACES CONNECTED WITH EACH OTHER IN PARRALLEL WITH RESPECT TO THE IN-FLOW OF SOLID CHARGE MATERIAL AND THE OUT-FLOW OF EVOLVED GAS AND ONE OR MORE PREHEATING CHAMBERS CONNECTED IN SERIES WITH SAID FURNACES WITH RESPECT TO SAID FLOWS, IN WHICH THE CYCLE OF EACH INDIVIDUAL FURNACE INCLUDES A REDUCTION PERIOD DURING WHICH THE FLOW OF EVOLCED GASES FROM SAID FURNACE IS CONNECTED SO AS TO PREHEAT SOLID CHARGE MATERIALS CONTINOUSLY ENTERING SAID FURNACE FROM ONE OR MORE OF THE PREHEATING CHAMBERS BY CONTERCURRENT FLOW IN SUCH CHAMBER, A BATCH REFINING PERIOD DURING WHICH SAID FURNACE IS DISCONNECTED FROM THE REST OF THE UNIT WITH RESPECT TO THE FLOWS OF SOLID CHARGE MATERIALS AND EVOLVED GAS, AND A REPAIR PERIOD DURING WHICH SAID FURNACE IS CONDITIONED FOR THE SUCCEEDING CYCLE.
References Cited (Backward Citations)
GB191122236A
Cited
GB309458A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |