Patent US3740199A successfully refreshed from Google Patents.
US3740199A
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Ore separation process
Assignee: Nuclear Fuel Services Inc
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Filing: 1971-04-07
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Granted: 1973-06-19
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Expires: 1991-04-07
Abstract
Abstract A PROCESS FOR THE RECOVERY OF COLUMBIUM, TANTALUM, MOLYBDENUM, URANIUM, THE RAARE EARTHS AND THRIUM FROM EUXENITE ORE USING THERMITE REDUCTION TO CONVERT THE ORE TO A PRODUCT WHERE THE URANIUUM AND RARE EARTHS IN THE SLAGG CAN BE READILY LEACHED FROM THE SLAG WITH MINERAL ACIDS. THE OTHER PRODUCT RECOVERED IS A METAL REGULUS CONTAINING A COMMERCIALLY USEABLE FERRO-COLUMBIUM OR FERRO-TANTALUM PRODUCT.
Inventors
- 👤 W Householder
- 👤 A Gammill
- 👤 T Runion
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:03
CPC Classifications
C; C22; C22B; C22B60/00; C22B60/02; C22B60/0291; C01; C01F; C01F15/00; C01F17/00; C01F17/20; C01F17/206; C01F17/218; C22B34/00; C22B34/20; C22B34/24; C22B5/00; C22B5/02; C22B5/04; C22B5/06; C22B60/0204; C22B60/0208; C22B60/0213; C22B60/0217; C22B60/0221; C22B60/0226; Y; Y10; Y10S; Y10S75/00; Y10S75/959
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |