Patent EP0482287A1 successfully refreshed from Google Patents.
US3728104A
Expired / Lapsed
US
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Cobalt recovery
Assignee: Ethyl Corp
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Filing: 1971-04-29
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Granted: 1973-04-17
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Expires: 1991-04-29
Abstract
Abstract APROCESS FOR RECOVERY OF COBALT FROM A HYDROMETALLURGICAL REACTION MIXTURE PREPARED IN A PROCESS FOR WINNING COBALT AND/OR NICKEL BY CONTACTING THE REACTION MIXTURE CONTAINING COBALT TETRACARBONYL ANION WITH A STRONG ACID AND DECOMPOSING THE COBALT CARBONYL HYDRIDE FORMED TO COBALT CARBONYL, SEPARATING THE COBALT CARBONYL FROM THE ACIDIFIED REACTION MIXTURE AND THERMALLY DECOMPOSING THE COBALT CARBONYL TO METALLIC COBALT AND RECOVERING THE METALLIC COBALT.
Inventors
- 👤 T Coffield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:42
CPC Classifications
C; C22; C22B; C22B5/00; C22B5/02; C22B5/20; C22B23/00; C22B23/06; C22B23/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |