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US2989971A
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Tripper valve
Assignee: Bendix Westinghouse Automotive Air Brake Co
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Filing: 1957-02-04
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Granted: 1961-06-27
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Expires: 1977-02-04
Abstract
No abstract record available.
Inventors
- 👤 Harry M Valentine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:34
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/04; G05D16/10; G05D16/024; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2544; Y10T137/7722; Y10T137/7738; Y10T137/774; Y10T137/7781; Y10T137/7835
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2680447A
Cited
US1726102A
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US2488949A
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GB707165A
Cited
US2764174A
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US2860662A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |