US3829374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode with protective coating
Assignee: Rio Tinto Switzerland AG
•
Filing: 1972-11-15
•
Granted: 1974-08-13
•
Expires: 1992-11-15
Abstract
Abstract AN ELECTRODE, ESPECIALLY AN ANODE FOR ELECTROLYTIC PRODUCTION OF ALUMINUM, IS PROTECTD AGAINST OXIDATION IN SERVICE BY MEANS OF A COATING CONSISTING OF A MATERIAL WHICH HAS BEEN APPLIED AS PARTICLES AT LEAST PARTLY MOLTEN AT HIGH TEMPERATURE, AND HAS SOLIDIFIED IN SITU, SO THAT IN THE COATING THE SAID PARTICLES ARE BONDED TOGETHER OVER AT LEAST A PART OF THEIR EXTERIOR. THE COATING MATERIAL INCLUDES ALUMINUM OXIDE AND FACULTATIVELY ALUMINIUM, BOTH THEN BEING APPLIED SIMULTANEOUSLY AS A CERMET OR AS SUCCESSIVE LAYERS IN SANDWICH STRUCTURE. THE COATING HS PREFERABLY A THICKNESS OF 0.1 TO 1.0 MM.AND HAS SUITABLY BENN APPLIED BY MEANS OF A PLASMA BURNER.
Inventors
- 👤 T Kugler
- 👤 H Rieger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:24
CPC Classifications
C; C23; C23C; C23C4/00; C23C4/04; C23C4/10; C23C4/06; C23C4/08; C23C4/11; C25; C25C; C25C3/00; C25C3/06; C25C3/08; C25C3/12
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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |