US539500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic time-switch for storage-batteries
Assignee: —
•
Filing: —
•
Granted: 1895-05-21
•
Expires: 1912-05-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:58
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/50; G; G01; G01R; G01R31/00; G01R31/36; G01R31/396
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1898-05-20 | 1898-11-19 | 1899-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1902-05-21 | 1902-11-20 | 1903-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1906-05-21 | 1906-11-20 | 1907-05-22 | $7700.00 | Window Closed / Lapsed |