US3764493A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of nickel and cobalt
Assignee: United States Department of the Interior
•
Filing: 1972-08-31
•
Granted: 1973-10-09
•
Expires: 1992-08-31
Abstract
Abstract NICKEL AND COBALT ARE SEPARATED AND RECOVERED FROM ORES OR ALLOY SCRAP BY SELECTIVE CATHODIC REDUCTION AND DEPOSITION OF NICKEL IN A GALVANIC CELL. THE GALVANIC CELL EMPLOYS SEPARATE CATHODE AND ANODE SECTIONS, A NICKEL CATHODE, A COBALT ANODE AND A FUSED SALT ELECTROLYTE. THE CATHOLYTE AND ANOLYTE COMPARTMENTS OF THE CELL ARE CONNECTED BY MEANS OF A POROUS DIAPHRAGM, WHILE THE CATHODE AND ANODE ARE DIRECTLY ELECTRICALLY CONNECTED EXTERNALLY.
Inventors
- 👤 L Nicks
- 👤 K Lei
- 👤 T Sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:30
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/34
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |