Patent US419731A successfully refreshed from Google Patents.
US419731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable faradic battery
Assignee: —
•
Filing: —
•
Granted: 1890-01-21
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Expires: 1907-01-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:56
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/02
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) | 1893-01-20 | 1893-07-22 | 1894-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1897-01-20 | 1897-07-22 | 1898-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1901-01-21 | 1901-07-23 | 1902-01-22 | $7700.00 | Window Closed / Lapsed |