Patent US2986427A successfully refreshed from Google Patents.
US2986427A
Expired / Lapsed
US
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Variable load brake control apparatus for railway cars
Assignee: Westinghouse Air Brake Co
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Filing: 1959-01-28
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Granted: 1961-05-30
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Expires: 1979-01-28
Abstract
No abstract record available.
Inventors
- 👤 Glenn T Mcclure
- 👤 George K Newell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:01
CPC Classifications
B; B60; B60T; B60T8/00; B60T8/18; B60T8/1893
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) | 1964-05-29 | 1964-11-28 | 1965-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-29 | 1968-11-28 | 1969-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-29 | 1972-11-28 | 1973-05-30 | $7700.00 | Window Closed / Lapsed |