US2771341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for gaining vanadium values from vanadium containing iron ores
Assignee: HOGANIS BILLESHOLMS AB
•
Filing: 1951-07-17
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Granted: 1956-11-20
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Expires: 1971-07-17
Abstract
No abstract record available.
Inventors
- 👤 Otto F F Barth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:35
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/20; C22B34/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
PROCESS FOR THE RECOVERY OF VANADIUM FROM VANADIUM CONTAINING IRON ORE WHICH COMPRISES MIXING INGREDIENTS CONSISTING ESSENTIALLY OF SUCH IRON ORE IN FINELY DIVIDED FORM AND AN ALKALI METAL COMPOUND, SINTERING THE RESULTING MIXTURE AT A TEMPERATURE OF AT LEAST ABOUT 1100* C. FOR THE PRODUCTION OF LUMPS OF A SIZE SUITABLE FOR CHARGING A BLAST FURNACE, AND LEACHING SAID LUMPS WITH WATER.
Claim 2
Dependent Claim
63 words
PROCESS FOR THE RECOVERY OF VANADIUM FROM VANADIUM CONTAINING IRON ORE WHICH COMPRISES MIXING INGREDIENTS CONSISTING ESSENTIALLY OF SUCH IRON ORE IN FINELY DIVIDED FORM AND AN ALKALI METAL COMPOUND, SINTERING THE RESULTING MIXTURE AT A TEMPERATURE OF AT LEAST ABOUT 1100* C. FOR THE PRODUCTION OF LUMPS OF A SIZE SUITABLE FOR CHARGING A BLAST FURNACE, AND LEACHING SAID LUMPS WITH WATER.
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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) | 1959-11-20 | 1960-05-21 | 1960-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-20 | 1964-05-21 | 1964-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-20 | 1968-05-21 | 1968-11-20 | $7700.00 | Window Closed / Lapsed |