US3135672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for feeding alumina to electrolytic cell
Assignee: Nippon Light Metal Co Ltd
•
Filing: 1960-01-12
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Granted: 1964-06-02
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Expires: 1980-01-12
Abstract
No abstract record available.
Inventors
- 👤 Hirakawa Tamiro
- 👤 Asano Kosuke
- 👤 Mukoyama Shigeki
- 👤 Hara Shuichiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:55
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
THE METHOD OF FEEDING ALUMINA TO AN ALUMINUM ELECTROLYTIC CELL CONTAINING MOLTEN ALUMINUM COVERED BY A MOLTEN ELECTROLYTIC BATH ENGAGED BY AN ELECTRODE WHICH CONSISTS OF THE STEPS OF SUPPLYING A FORCEFUL JET OF GAS UNDER PRESSURE TO THE CELL, PRODUCING A RIPPLE ON THE LIQUID SURFACE OF THE MOLTEN ELECTROLYTIC BATH BY IMPRINGING THE FORCEFUL JET OF GAS DIRECTLY ON A LIMITED AREA OF THE LIQUID
Claim 2
Independent Claim
67 words
THE METHOD OF FEEDING ALUMINA TO AN ALUMINUM ELECTROLYTIC CELL CONTAINING MOLTEN ALUMINUM COVERED BY A MOLTEN ELECTROLYTIC BATH ENGAGED BY AN ELECTRODE WHICH CONSISTS OF THE STEPS OF SUPPLYING A FORCEFUL JET OF GAS UNDER PRESSURE TO THE CELL, PRODUCING A RIPPLE ON THE LIQUID SURFACE OF THE MOLTEN ELECTROLYTIC BATH BY IMPRINGING THE FORCEFUL JET OF GAS DIRECTLY ON A LIMITED AREA OF THE LIQUID
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) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |