Patent US3282677A successfully refreshed from Google Patents.
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 20:15
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.
References Cited (Backward Citations)
US2311962A
Cited
US2475607A
Cited
US2485945A
Cited
US2880083A
Cited
US2823108A
Cited
US3061296A
Cited
US2931720A
Cited
US3168386A
Cited
US3079248A
Cited
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 |