Patent US3491002A successfully refreshed from Google Patents.
US3491002A
Expired / Lapsed
US
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Adjusting anode blocks in an electrolytic cell
Assignee: Reynolds Metals Co
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Filing: 1964-09-21
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Granted: 1970-01-20
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Expires: 1984-09-21
Abstract
No abstract record available.
Inventors
- 👤 John L Dewey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:41
CPC Classifications
C; C25; C25C; C25C3/00; C25C3/06; C25C3/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3128371A
Cited
US3345273A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |