Patent US2744820A successfully refreshed from Google Patents.
US2744820A
Expired / Lapsed
US
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Method for the production of iron and steel
Assignee: Individual
•
Filing: 1952-12-02
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Granted: 1956-05-08
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Expires: 1972-12-02
Abstract
No abstract record available.
Inventors
- 👤 Kocks Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:48
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
90 words
IN A METHOD FOR THE PRODUCTION OF IRON AND STEEL FROM IRON ORES IN AN ELECTRODE OPERATED FURNACE THE STEPS OF GRADUALLY SUPPLYING THE IRON ORE AND THE FLUX ONTO THE SURFACE OF AN ELECTRICALLY HEATED IRON MELTED MAINTAINED IN SAID FURNACE IN A MOLTEN STATE AND AT THE CONTENTS OF 1 TO ABOUT 4.5 PER CENT CARBON, REDUCING THE IRON ORE CONTINUOUSLY BY THE CARBON OF THE IRON MELT, CONTINUOUSLY REPLACING THE CARBON CONTENTS OF THE IRON MELT BY MEANS OF A VERTICALLY ADJUSTABLE CARBON ROD REACHING INTO SAID
References Cited (Backward Citations)
US1459187A
Cited
US1888312A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-08 | 1959-11-07 | 1960-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-08 | 1963-11-07 | 1964-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-08 | 1967-11-07 | 1968-05-08 | $7700.00 | Window Closed / Lapsed |