US3149961A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processing of manganiferous ores
Assignee: RN Corp
•
Filing: 1961-09-27
•
Granted: 1964-09-22
•
Expires: 1981-09-27
Abstract
No abstract record available.
Inventors
- 👤 Moklebust Olav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:06
CPC Classifications
C; C22; C22B; C22B47/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
THE METHOD OF RECOVERING MAGNESE FROM MANGANIFEROUS ORES, WHICH COMPRISES: REDUCING SAID ORE IN THE PRESENCE OF A GASEOUS REDUCING AGENT AT A TEMPERATURE OF ABOUT 1000-1100*C. UNTIL THE IRON VALUES ARE SUBSTANTIALLY ALL REDUCED TO THE METALLIC STATE WITHOUT FUSION, SEPARATING THE REDUCED ORE INTO MAGNETIC AND NON-MAGNETIC FRACITONS, AND EXTRACTING THE NON-MAGNETIC FRACTION WITH A DILUTE AQUEOUS SOLUTION OF SULPHURIC AND HYDROFLUORIC ACIDS FOR RECOVERY OF MAGANESE VALUES.
Claim 2
Independent Claim
70 words
THE METHOD OF RECOVERING MAGNESE FROM MANGANIFEROUS ORES, WHICH COMPRISES: REDUCING SAID ORE IN THE PRESENCE OF A GASEOUS REDUCING AGENT AT A TEMPERATURE OF ABOUT 1000-1100*C. UNTIL THE IRON VALUES ARE SUBSTANTIALLY ALL REDUCED TO THE METALLIC STATE WITHOUT FUSION, SEPARATING THE REDUCED ORE INTO MAGNETIC AND NON-MAGNETIC FRACITONS, AND EXTRACTING THE NON-MAGNETIC FRACTION WITH A DILUTE AQUEOUS SOLUTION OF SULPHURIC AND HYDROFLUORIC ACIDS FOR RECOVERY OF MAGANESE VALUES.
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) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |