US447529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-magnetic cut-out
Assignee: —
•
Filing: —
•
Granted: 1891-03-03
•
Expires: 1908-03-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:20
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/54; H01H50/546
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) | 1894-03-02 | 1894-09-01 | 1895-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1898-03-02 | 1898-09-01 | 1899-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1902-03-03 | 1902-09-02 | 1903-03-04 | $7700.00 | Window Closed / Lapsed |