Patent US2880083A successfully refreshed from Google Patents.
US2880083A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing sponge iron
Assignee: RN Corp
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Filing: 1954-05-06
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Granted: 1959-03-31
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Expires: 1974-05-06
Abstract
No abstract record available.
Inventors
- 👤 Fritz O Wienert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:24
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/0066
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
IN A PROCESS FOR PRODUCING SPONGS IRON BY REDUCING IRON-CONTAINING ORE WITH SOLID FUEL THE IMPROVEMENT WHICH COMPRISES COATING MOISTENED FUEL WITH A FINELY DIVIDED COMPOUND SELECTED FROM THE GROUP CONSISTING OF CALCIUM AND MAGNESIUM OXIDES, HYDOROXIDES, CARBONATES, AND MIXTURES THEREOF IN THE ABSENCE OF THE IRON CONTAINING ORE AND SUBSEQUENTLY, WITHOUT PRELIMINARY HEATING OF SAID COATED FUEL, MIXING SAID COATED FUEL WITH SAID ORE AND REDUCING SAID ORE BY HEATING SAID MIXTURE OF COATED FUEL AND ORE AT ELEVATED TEMPERATURES TO FORM A SPONGE IRON PRODUCT.
Claim 2
Dependent Claim
87 words
IN A PROCESS FOR PRODUCING SPONGS IRON BY REDUCING IRON-CONTAINING ORE WITH SOLID FUEL THE IMPROVEMENT WHICH COMPRISES COATING MOISTENED FUEL WITH A FINELY DIVIDED COMPOUND SELECTED FROM THE GROUP CONSISTING OF CALCIUM AND MAGNESIUM OXIDES, HYDOROXIDES, CARBONATES, AND MIXTURES THEREOF IN THE ABSENCE OF THE IRON CONTAINING ORE AND SUBSEQUENTLY, WITHOUT PRELIMINARY HEATING OF SAID COATED FUEL, MIXING SAID COATED FUEL WITH SAID ORE AND REDUCING SAID ORE BY HEATING SAID MIXTURE OF COATED FUEL AND ORE AT ELEVATED TEMPERATURES TO FORM A SPONGE IRON PRODUCT.
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) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |