US3140169A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ore reduction and recovery method
Assignee: RN Corp
•
Filing: 1961-09-27
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Granted: 1964-07-07
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Expires: 1981-09-27
Abstract
No abstract record available.
Inventors
- 👤 Rollin P Smith
- 👤 Moklebust Olav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:41
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/0086; C21B13/14; C21B13/146; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A PROCESS FOR LOW TEMPERATURE REDUCTION AND RECOVERY OF IRON IN HIGH YIELD FROM IRON OXIDE BEARING MATERIALS, AND AS A METALLIC IRON CONCNETRATE OF HIGH PURITY, WHICH COMPRISES: REDUCING A CHARGE OF SAID ORE WITHOUT FUSION, COMMINUTING THE REDUCED PRODUCT AND MAGNETICALLY CONCENTRATING THE IRON VALUES, SEPARATING THE CONCENTRATE INTO FRACTIONS OF HIGHER AND LOWER PURITY, PLELETIZING THE LATTER AND ADMIXING WITH A CHARGE OF FRESH ORE, SUBJECTING THE MIXTURE TO REDUCTION WITHOUT FUSION, COMMINUTING THE REDUCED PRODUCT AND MAGNETICALLY CONCENTRATING THE IRON VALUES.
Claim 2
Dependent Claim
85 words
A PROCESS FOR LOW TEMPERATURE REDUCTION AND RECOVERY OF IRON IN HIGH YIELD FROM IRON OXIDE BEARING MATERIALS, AND AS A METALLIC IRON CONCNETRATE OF HIGH PURITY, WHICH COMPRISES: REDUCING A CHARGE OF SAID ORE WITHOUT FUSION, COMMINUTING THE REDUCED PRODUCT AND MAGNETICALLY CONCENTRATING THE IRON VALUES, SEPARATING THE CONCENTRATE INTO FRACTIONS OF HIGHER AND LOWER PURITY, PLELETIZING THE LATTER AND ADMIXING WITH A CHARGE OF FRESH ORE, SUBJECTING THE MIXTURE TO REDUCTION WITHOUT FUSION, COMMINUTING THE REDUCED PRODUCT AND MAGNETICALLY CONCENTRATING THE IRON VALUES.
References Cited (Backward Citations)
US1800856A
Cited
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 |