Patent US2881137A successfully refreshed from Google Patents.
US875810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic fire-alarm.
Assignee: Individual
•
Filing: 1907-01-12
•
Granted: 1908-01-07
•
Expires: 1927-01-12
Abstract
No abstract record available.
Inventors
- 👤 Bruce C Hall
- 👤 Floyd W Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:15
CPC Classifications
H; H01; H01H; H01H37/00; H01H37/74; H01H37/76; H01H37/767
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) | 1911-01-06 | 1911-07-08 | 1912-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1915-01-06 | 1915-07-08 | 1916-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1919-01-06 | 1919-07-08 | 1920-01-07 | $7700.00 | Window Closed / Lapsed |