US2656501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interlocked control apparatus for combined dynamic, track, and shaft brake equipment
Assignee: Westinghouse Air Brake Co
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Filing: 1951-09-26
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Granted: 1953-10-20
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Expires: 1971-09-26
Abstract
No abstract record available.
Inventors
- 👤 George L Cotter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:23
CPC Classifications
B; B60; B60L; B60L7/00; B60L7/24; B60L2200/00; B60L2200/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |