US3429248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure control systems for closed chambers
Assignee: Westland Group PLC
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Filing: 1966-08-05
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Granted: 1969-02-25
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Expires: 1986-08-05
Abstract
No abstract record available.
Inventors
- 👤 Owen D A C Furlong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:51
CPC Classifications
B; B64; B64D; B64D13/00; B64D13/02; B64D13/04; F; F15; F15C; F15C1/00; F15C1/006; G; G05; G05D; G05D16/00; G05D16/024; G05D16/14; G05D16/16; G05D16/163; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/2065; Y10T137/2071; Y10T137/212; Y10T137/2125; Y10T137/2147
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) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |