Patent US3244604A successfully refreshed from Google Patents.
US3244604A
Expired / Lapsed
US
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Method and apparatus for the activation of amelt of a fused salt
Assignee: Individual
•
Filing: 1962-12-03
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Granted: 1966-04-05
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Expires: 1982-12-03
Abstract
No abstract record available.
Inventors
- 👤 Isaac M Diller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:20
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
32 words
THE PROCESS OF ELECTROWINNING ALUMINUM COMPRISING THE STEPS OF ACTIVATING THE ELECTROLYTE BY MEANS OF APPLYING THERETO A PREDETERMINED FINITE SERIES OF HIGH ENERGY IMPULSES, SAID IMPULSES HAVING A PEAK VOLTAGE IN
References Cited (Backward Citations)
US2939824A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-04-04 | 1969-10-04 | 1970-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-04 | 1973-10-04 | 1974-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-04 | 1977-10-04 | 1978-04-05 | $7700.00 | Window Closed / Lapsed |