Patent US1428049A successfully refreshed from Google Patents.
US1428049A
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US
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Electrolytic apparatus and method of depolarizing the same
Assignee: Individual
•
Filing: 1919-02-08
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Granted: 1922-09-05
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Expires: 1939-02-08
Abstract
No abstract record available.
Inventors
- 👤 Walter D Nickum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:51
CPC Classifications
C; C25; C25B; C25B15/00; C25D; C25D17/00; C25D17/008; H; H01; H01F; H01F27/00
Claims Analysis
Total Claims: 0
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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) | 1925-09-04 | 1926-03-06 | 1926-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-09-04 | 1930-03-06 | 1930-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-09-04 | 1934-03-06 | 1934-09-05 | $7700.00 | Window Closed / Lapsed |