US2642972A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for fluid pressure actuated propeller clutches
Assignee: Westinghouse Air Brake Co
•
Filing: 1949-03-11
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Granted: 1953-06-23
•
Expires: 1969-03-11
Abstract
No abstract record available.
Inventors
- 👤 Ralph C Brooks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:49
CPC Classifications
F; F16; F16D; F16D48/00; F16D48/02; F16D48/04; B; B63; B63H; B63H21/00; B63H21/21; B63H21/213; B63H23/00; B63H23/02; B63H23/08; B63H23/30; F16D25/00; F16D25/12; F16D25/14; F16H; F16H3/00; F16D2048/0209; F16H2712/00; F16H2712/04; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19219; Y10T74/19251; Y10T74/19256; Y10T74/1926; Y10T74/19265
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2058550A
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US2175219A
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US2144074A
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US2226801A
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US2152089A
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US2355710A
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US2277554A
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US2286585A
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US2375440A
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US2408638A
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US2432272A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-22 | 1956-12-22 | 1957-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-22 | 1960-12-22 | 1961-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-22 | 1964-12-22 | 1965-06-23 | $7700.00 | Window Closed / Lapsed |