Patent US672913A successfully refreshed from Google Patents.
US672913A
Expired / Lapsed
US
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Electrolytic current rectifier and condenser.
Assignee: Individual
•
Filing: 1899-03-07
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Granted: 1901-04-30
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Expires: 1919-03-07
Abstract
No abstract record available.
Inventors
- 👤 Charles Pollak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:14
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/022
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) | 1904-04-29 | 1904-10-29 | 1905-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1908-04-29 | 1908-10-29 | 1909-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1912-04-29 | 1912-10-29 | 1913-04-30 | $7700.00 | Window Closed / Lapsed |