US2472526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underspeed motor protective system
Assignee: Westinghouse Air Brake Co
•
Filing: 1945-01-26
•
Granted: 1949-06-07
•
Expires: 1965-01-26
Abstract
No abstract record available.
Inventors
- 👤 Albert C Frazee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:01
CPC Classifications
B; B65; B65G; B65G43/00; B65G43/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1047557A
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DE516022C
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US1872133A
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US1936620A
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US2119389A
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US2178290A
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US2184315A
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US2237003A
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US2334863A
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US2352299A
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US2322114A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-06 | 1952-12-06 | 1953-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-06 | 1956-12-06 | 1957-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-06 | 1960-12-06 | 1961-06-07 | $7700.00 | Window Closed / Lapsed |