Patent US2043053A successfully refreshed from Google Patents.
Patent US2653088A successfully refreshed from Google Patents.
US2653088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct production of steel from oxides of iron
Assignee: Individual
•
Filing: 1951-08-09
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Granted: 1953-09-22
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Expires: 1971-08-09
Abstract
No abstract record available.
Inventors
- 👤 Robert D Pike
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:41
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/14; C21B13/0073; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
THE PROCESS OF REDUCING IRON OXIDE WITHOUT FUSION COMBINED WITH THE MAKING OF STEEL FROM THE REDUCED OXIDE, WHICH COMPRISES PASSING A HOT REDUCING GAS SUBSTANTIALLY FREE OF HYDROCARBON CONTAINING ENDOTHERMIC AND EXOTHERMIC COMPONENTS, THE LATTER BEING CO, THROUGH THE OXIDE AT A TEMPERATURE BETWEEN 1650-2000* F. TO REDUCE THE GREATER PART OF IT TO METALLIC IRON BY GASEOUS REDUCTION, COOLING THE OXIDE THUS REDUCED WITH SIMILAR RELATIVELY COOL REDUCING GAS BY THE RERACTION 2CO=CO2+C, TO DEPOSIT SUFFICIENT CARBON FOR REDUCING THE UNREDUCED OXIDE; THEN COMPLETING COOLING UNDER NON-OXIDIZING CONDITIONS, AND SUBSTANTIALLY FINISHING THE REDUCTION OF SAID OXIDE IN A STEELMAKING STEP, WITH THE PRODUCTION OF STEEL.
Claim 2
Dependent Claim
107 words
THE PROCESS OF REDUCING IRON OXIDE WITHOUT FUSION COMBINED WITH THE MAKING OF STEEL FROM THE REDUCED OXIDE, WHICH COMPRISES PASSING A HOT REDUCING GAS SUBSTANTIALLY FREE OF HYDROCARBON CONTAINING ENDOTHERMIC AND EXOTHERMIC COMPONENTS, THE LATTER BEING CO, THROUGH THE OXIDE AT A TEMPERATURE BETWEEN 1650-2000* F. TO REDUCE THE GREATER PART OF IT TO METALLIC IRON BY GASEOUS REDUCTION, COOLING THE OXIDE THUS REDUCED WITH SIMILAR RELATIVELY COOL REDUCING GAS BY THE RERACTION 2CO=CO2+C, TO DEPOSIT SUFFICIENT CARBON FOR REDUCING THE UNREDUCED OXIDE; THEN COMPLETING COOLING UNDER NON-OXIDIZING CONDITIONS, AND SUBSTANTIALLY FINISHING THE REDUCTION OF SAID OXIDE IN A STEELMAKING STEP, WITH THE PRODUCTION OF STEEL.
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) | 1956-09-21 | 1957-03-23 | 1957-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-21 | 1961-03-23 | 1961-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-21 | 1965-03-23 | 1965-09-22 | $7700.00 | Window Closed / Lapsed |