Patent US2609288A successfully refreshed from Google Patents.
US2609288A
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Process for the reduction of metal oxides by gases
Assignee: Individual
•
Filing: 1950-03-08
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Granted: 1952-09-02
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Expires: 1970-03-08
Abstract
No abstract record available.
Inventors
- 👤 Isobel E Stuart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:23
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/0073; C21B13/02; C21B2100/00; C21B2100/20; C21B2100/28; C21B2100/282; C21B2100/60; C21B2100/66; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/122; Y02P10/134; Y02P10/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A PROCESS FOR THE REDUCTION OF METAL OXIDES WITHOUT FUSION WHICH COMPRISES THE STEPS OF FEEDING OXIDE ORE TO A FURNACE HAVING PREHEATING, REDUCTION AND COOLING ZONES ONE BELOW THE OTHER, PREHEATING AND EFFECTING REDUCTION OF THE ORE BY ALTERNATE CYCLES OF GAS CIRCULATION, THE FIRST CYCLE COMPRISING THE CIRCULATION OF A HOT GAS THROUGH THE REDUCTION AND PREHEATING ZONES,
Claim 2
Dependent Claim
60 words
A PROCESS FOR THE REDUCTION OF METAL OXIDES WITHOUT FUSION WHICH COMPRISES THE STEPS OF FEEDING OXIDE ORE TO A FURNACE HAVING PREHEATING, REDUCTION AND COOLING ZONES ONE BELOW THE OTHER, PREHEATING AND EFFECTING REDUCTION OF THE ORE BY ALTERNATE CYCLES OF GAS CIRCULATION, THE FIRST CYCLE COMPRISING THE CIRCULATION OF A HOT GAS THROUGH THE REDUCTION AND PREHEATING ZONES,
References Cited (Backward Citations)
US1310724A
Cited
US1269054A
Cited
US1433854A
Cited
US1824960A
Cited
US2142100A
Cited
US2166207A
Cited
US2231760A
Cited
US2501189A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-02 | 1956-03-03 | 1956-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-02 | 1960-03-03 | 1960-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-02 | 1964-03-03 | 1964-09-02 | $7700.00 | Window Closed / Lapsed |