US3140168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduction of iron ore with hydrogen
Assignee: Inland Steel Co
•
Filing: 1961-05-31
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Granted: 1964-07-07
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Expires: 1981-05-31
Abstract
No abstract record available.
Inventors
- 👤 James W Halley
- 👤 John E Mcconnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:27
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/14; C21B13/0073; C21B13/12; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
AN IRON ORE REDUCTION PROCESS WHICH COMPRISES REACTING IRON OXIDES OR IN A FIRST STEP WITH A HYDROGEN-CONTAINING GAS UNDER CONDITIONS TO EFFECT PARTIAL REDUCTION OF THE ORE, EFFECTING THERMAL DECOMPOSITION OF MOLECUALR HYDROGEN IN A SECOND STEP TO OBTAIN ATOMIC HYDROGEN, SUPPLYING PARTIALLY REDUCED ORE FROM THE FIRST STEP TO SAID SECOND STEP AND REACTING THE SAME WITH A PART OF SAID ATOMIC HYDROGEN TO OBTAIN IRON, SAID IRON BEING MELTED IN SAID SECOND STEP BY THE HEAT SUPPLIED FOR SAID THERMAL DECOMPOSITION AND BY THE HEAT EVOLVED DURING RECOMBINATION OF THE REMAINDER OF SAID ATOMIC HYDROGEN TO FORM MOLECULAR HYDROGEN, PASSING HYDROGEN-CONATINING GAS FROM SAID SECOND STEP TO SAID FIRST STEP, WITHDRAWING EXCESS HYDROGEN FROM SAID FIRST STEP, COMBINING PART OF SAID EXCESS HYDRO-
Claim 2
Dependent Claim
126 words
AN IRON ORE REDUCTION PROCESS WHICH COMPRISES REACTING IRON OXIDES OR IN A FIRST STEP WITH A HYDROGEN-CONTAINING GAS UNDER CONDITIONS TO EFFECT PARTIAL REDUCTION OF THE ORE, EFFECTING THERMAL DECOMPOSITION OF MOLECUALR HYDROGEN IN A SECOND STEP TO OBTAIN ATOMIC HYDROGEN, SUPPLYING PARTIALLY REDUCED ORE FROM THE FIRST STEP TO SAID SECOND STEP AND REACTING THE SAME WITH A PART OF SAID ATOMIC HYDROGEN TO OBTAIN IRON, SAID IRON BEING MELTED IN SAID SECOND STEP BY THE HEAT SUPPLIED FOR SAID THERMAL DECOMPOSITION AND BY THE HEAT EVOLVED DURING RECOMBINATION OF THE REMAINDER OF SAID ATOMIC HYDROGEN TO FORM MOLECULAR HYDROGEN, PASSING HYDROGEN-CONATINING GAS FROM SAID SECOND STEP TO SAID FIRST STEP, WITHDRAWING EXCESS HYDROGEN FROM SAID FIRST STEP, COMBINING PART OF SAID EXCESS HYDRO-
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) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |