Patent US4709231A successfully refreshed from Google Patents.
US847157A
Expired / Lapsed
US
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Signaling apparatus.
Assignee: Individual
•
Filing: 1905-04-04
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Granted: 1907-03-12
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Expires: 1925-04-04
Abstract
No abstract record available.
Inventors
- 👤 Harold Gilbert Brown
- 👤 Ernest De Merindol Malan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:07
CPC Classifications
G; G08; G08B; G08B7/00; G08B7/06
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) | 1910-03-11 | 1910-09-10 | 1911-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1914-03-11 | 1914-09-10 | 1915-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1918-03-11 | 1918-09-10 | 1919-03-12 | $7700.00 | Window Closed / Lapsed |