Patent US2687786A successfully refreshed from Google Patents.
US2687786A
Expired / Lapsed
US
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Disk brake
Assignee: Westinghouse Air Brake Co
•
Filing: 1950-04-27
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Granted: 1954-08-31
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Expires: 1970-04-27
Abstract
No abstract record available.
Inventors
- 👤 Cecil S Kelley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:03
CPC Classifications
B; B61; B61H; B61H5/00; F; F16; F16D; F16D55/00; F16D55/02; F16D55/04; F16D55/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2136806A
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USRE22242E
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US2174400A
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US2277106A
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US2402400A
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US2416871A
Cited
US2440020A
Cited
US2451329A
Cited
US2451326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-30 | 1958-03-01 | 1958-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-30 | 1962-03-01 | 1962-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-30 | 1966-03-01 | 1966-08-31 | $7700.00 | Window Closed / Lapsed |