US408224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric signaling apparatus
Assignee: —
•
Filing: —
•
Granted: 1889-08-06
•
Expires: 1906-08-06
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:47
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/68; H04M1/70
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) | 1892-08-05 | 1893-02-04 | 1893-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1896-08-05 | 1897-02-04 | 1897-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1900-08-06 | 1901-02-05 | 1901-08-07 | $7700.00 | Window Closed / Lapsed |