US3282677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing iron by low temperature reduction with use of methane gas
Assignee: FUTAKUCHI
•
Filing: 1963-04-30
•
Granted: 1966-11-01
•
Expires: 1983-04-30
Abstract
No abstract record available.
Inventors
- 👤 Futakuchi Magoichi
- 👤 Wada Kanji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:02
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/0073; C21B13/008; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134; Y02P10/143
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
70 words
A METHOD OF MANUFACTURING IRON BY THE LOW TEMPERATURE REDUCTION OF IRON ORE IN POWDER FORM, COMPRISING MIXING CAST IRON CHIPS WITH SAID IRON ORE IN AN AMOUNT OF FROM 3 TO 5% BY WEIGHT OF THE RESULTING MIXTURE, AND FEEDING THE MIXTURE INTO A REDUCTION FURNACE HEATED TO A TEMPERATURE OF 500 TO 700C., WHILE SUPPLYING METHANE GAS UNDER PRESSURE INTO SAID REDUCTION FURNACE, TO REDUCE SAID IRON ORE.
Claim 2
Independent Claim
70 words
A METHOD OF MANUFACTURING IRON BY THE LOW TEMPERATURE REDUCTION OF IRON ORE IN POWDER FORM, COMPRISING MIXING CAST IRON CHIPS WITH SAID IRON ORE IN AN AMOUNT OF FROM 3 TO 5% BY WEIGHT OF THE RESULTING MIXTURE, AND FEEDING THE MIXTURE INTO A REDUCTION FURNACE HEATED TO A TEMPERATURE OF 500 TO 700C., WHILE SUPPLYING METHANE GAS UNDER PRESSURE INTO SAID REDUCTION FURNACE, TO REDUCE SAID IRON ORE.
Claim 3
Independent Claim
68 words
A METHOD OF MANUFACTURING IRON BY THE LOW TEMPERATURE REDUCTION OF IRON ORE IN POWDER FORM, COMPRISING MIXING BAUXITE WITH SAID IRON ORE IN AN AMOUNT OF FROM 3 TO 5% BY WEIGHT OF THE RESULTING MIXTURE, AND FEEDING THE MIXTURE INTO A REDUCTION FURNACE HEATED TO A TEMPERATURE OF 500 TO 700*C., WHILE SUPPLYING METHANE GAS UNDER PRESSURE INTO SAID REDUCTION FURNACE, TO REDUCE SAID IRON ORE.
Claim 4
Independent Claim
68 words
A METHOD OF MANUFACTURING IRON BY THE LOW TEMPERATURE REDUCTION OF IRON ORE IN POWDER FORM, COMPRISING MIXING BAUXITE WITH SAID IRON ORE IN AN AMOUNT OF FROM 3 TO 5% BY WEIGHT OF THE RESULTING MIXTURE, AND FEEDING THE MIXTURE INTO A REDUCTION FURNACE HEATED TO A TEMPERATURE OF 500 TO 700*C., WHILE SUPPLYING METHANE GAS UNDER PRESSURE INTO SAID REDUCTION FURNACE, TO REDUCE SAID IRON ORE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-31 | 1970-05-02 | 1970-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-31 | 1974-05-02 | 1974-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-31 | 1978-05-02 | 1978-11-01 | $7700.00 | Window Closed / Lapsed |