Patent US2553824A successfully refreshed from Google Patents.
US2553824A
Expired / Lapsed
US
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Brake head and shoe mechanism
Assignee: Westinghouse Air Brake Co
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Filing: 1948-08-26
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Granted: 1951-05-22
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Expires: 1968-08-26
Abstract
No abstract record available.
Inventors
- 👤 Cecil S Kelley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:13
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/02; F16D65/04; F16D65/06; F16D65/062; F16D69/00; F16D2069/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2172565A
Cited
US979623A
Cited
US1979644A
Cited
DE649486C
Cited
GB442236A
Cited
US2095427A
Cited
US2168845A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |