US3692645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic process
Assignee: Rio Tinto Switzerland AG
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Filing: 1970-10-19
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Granted: 1972-09-19
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Expires: 1990-10-19
Abstract
Abstract PROCESS FOR THE ELECTROLYSIS OF MOLTEN OXIDES, ESPECIALLY OF ALUMINA, IN WHICH A GAS PERMEABLE ANODE IS SEPARATED FROM THE MELT BEING ELECTROLYZED BY A LAYER IN CONTACT WITH THE ANODE AND THE MELT, OF AN OXYGEN-ION-CONDUCTING MATERIAL, FOR EXAMPLE ZIRCONIUM OXIDE STABILIZED WITH CALCIUM OXIDE OR OTHER OXIDES, WHICH IS RESISTANT TO THE MELT AT THE TEMPERATURE OF THE ELECTROLYSIS.
Inventors
- 👤 Borut Marincek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:10
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06
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) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |