US3398081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prebaked carbon anodes and anode assembly for the production of aluminum
Assignee: Pechiney SA
•
Filing: 1966-04-05
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Granted: 1968-08-20
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Expires: 1986-04-05
Abstract
No abstract record available.
Inventors
- 👤 Bonfils Rene
- 👤 Rochettes Henri Des
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:11
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/08; C25C3/12; C25C3/125
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
36 words
A PREBAKED CARBON ANODE HAVING A CAVITY IN THE UPPER END PORTION FOR RECEIVING AN ANODE FOOT FOR ATTACHMENT THERETO IN WHICH THE CAVITY IS FORMED WITH HELICAL GROOVES EXTENDING DOWNWARDLY FROM THE UPPER END OF
Claim 2
Dependent Claim
36 words
A PREBAKED CARBON ANODE HAVING A CAVITY IN THE UPPER END PORTION FOR RECEIVING AN ANODE FOOT FOR ATTACHMENT THERETO IN WHICH THE CAVITY IS FORMED WITH HELICAL GROOVES EXTENDING DOWNWARDLY FROM THE UPPER END OF
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-20 | 1972-02-19 | 1972-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-20 | 1976-02-19 | 1976-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-20 | 1980-02-19 | 1980-08-20 | $7700.00 | Window Closed / Lapsed |