US3785941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory for production of aluminum by electrolysis of aluminum chloride
Assignee: Cabot Corp
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Filing: 1971-09-09
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Granted: 1974-01-15
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Expires: 1991-09-09
Abstract
Abstract SELECTIVE INTERFACIAL BOUNDING OF MOLTEN METAL CHLORIDE ELECTROLYTE BY NITRIDE-BASED REFRACTORY MATERIAL IN CELLS FOR PRODUCTION OF ALUMINUM AND CHLORINE BY ELECTROLYSIS OF ALUMINUM CHLORIDE.
Inventors
- 👤 S Jacobs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:40
CPC Classifications
C; C25; C25C; C25C7/00; C25C7/005; B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/68; C25C3/00; C25C3/06; C25C3/08; C25C3/18; C25C3/22
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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |