Patent US3672873A successfully refreshed from Google Patents.
US3672873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of nickel from cobalt
Assignee: Huntington Alloys Corp
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Filing: 1970-03-11
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Granted: 1972-06-27
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Expires: 1990-03-11
Abstract
Abstract DIRECTED TO A PROCES FOR SEPARATELY RECOVERING NICKEL AND COBALT FROM AN AQUEOUS SOLUTION CONTAINING THE SAME WHEREIN THE NICKEL AND COBALT CONTENTS ARE PRECIPITATED AS REDUCIBLE COMPOUNDS, E.G., BASIC CARBONATES, SEPARATING AND DRYING THE RESULTING PRECIPITATES, REDUCING THE COMPOUNDS AT A TEMPERATURE BELOW ABOUT 400*C. AND THEN TREATING THE REDUCED METAL PRODUCTS WITH CARBON MONOXIDE AT SUPERATMOSPHERIC PRESSURES AND A TEMPERATURE BELWO 100*C. TO EVOLVE NICKEL CARBONYL THEREBY SEPARTING THE NICKEL FROM THE COBALT IN THE REDUCED PRODUCT.
Inventors
- 👤 David Anthony Huggins
- 👤 Walter Curlook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:40
CPC Classifications
C; C22; C22B; C22B23/00; C22B23/06; C22B23/065; C22B5/00; C22B5/02; C22B5/20
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |