US851691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric switch mechanism.
Assignee: Westinghouse Air Brake Co
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Filing: 1905-08-02
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Granted: 1907-04-30
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Expires: 1925-08-02
Abstract
No abstract record available.
Inventors
- 👤 Frank C Newell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:36
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/24; H01H35/34
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) | 1910-04-29 | 1910-10-29 | 1911-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1914-04-29 | 1914-10-29 | 1915-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1918-04-29 | 1918-10-29 | 1919-04-30 | $7700.00 | Window Closed / Lapsed |