US3925069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing pellets with cement
Assignee: Nippon Steel Corp
•
Filing: 1973-11-30
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Granted: 1975-12-09
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Expires: 1993-11-30
Abstract
Abstract A process for producing pellets, which comprises blending 98 to 60% by weight of iron ores and 2 to 40% by weight of a mixture, comprising 95 to 15% by weight of cement and 5 to 85% by weight of iron containing powders smaller than 100 meshes and with addition of 9 to 20% by weight of water on the basis of the mixture.
Inventors
- 👤 Shunsaku Shimada
- 👤 Tadahiro Inazumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:40
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/14; C22B1/24; C22B1/242; C22B1/243
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
63 words
A PROCESS FOR PRODUCING PELLETS, WHICH COMPRISES BLENDING 98 TO 60% BY WEIGHT OF IRON ORES AND 2 TO 40% BY WEIGHT OF A MIXTURE COMPRISING 95 TO 15% BY WEIGHT OF CEMENT AND 5 TO 85% BY WEIGHT OF IRON CONTAINING POWDERS SMALLER THAN 100 MESHES WITH ADDITION OF 9 TO 20% BY WEIGHT OF WATER ON THE BASIS OF THE MIXTURE.
Claim 2
Dependent Claim
63 words
A PROCESS FOR PRODUCING PELLETS, WHICH COMPRISES BLENDING 98 TO 60% BY WEIGHT OF IRON ORES AND 2 TO 40% BY WEIGHT OF A MIXTURE COMPRISING 95 TO 15% BY WEIGHT OF CEMENT AND 5 TO 85% BY WEIGHT OF IRON CONTAINING POWDERS SMALLER THAN 100 MESHES WITH ADDITION OF 9 TO 20% BY WEIGHT OF WATER ON THE BASIS OF THE MIXTURE.
Claim 3
Dependent Claim
35 words
A process according to claim 1, in which the iron containing powder is one or more selected from the group consisting of cutting scrap of iron, atomized iron powder, reduced iron powder and ferruginous scale.
References Cited (Backward Citations)
US1104124A
Cited
US1175933A
Cited
US1315315A
Cited
US2363371A
Cited
US2910372A
Cited
US2887392A
Cited
US3235371A
Cited
US3374085A
Cited
US3490895A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-08 | 1979-06-09 | 1979-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-08 | 1983-06-09 | 1983-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-08 | 1987-06-09 | 1987-12-09 | $7700.00 | Window Closed / Lapsed |