US2767735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve device
Assignee: DUMONT AIRCRAFT FITTING Co
•
Filing: 1951-10-24
•
Granted: 1956-10-23
•
Expires: 1971-10-24
Abstract
No abstract record available.
Inventors
- 👤 William H Darling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:31
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/03; F16K15/033; Y; Y10; Y10T; Y10T137/00; Y10T137/7504; Y10T137/7722; Y10T137/7837; Y10T137/7898
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1304113A
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US827823A
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GB190911193A
Cited
GB191517622A
Cited
US1280063A
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US2133739A
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US2173973A
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US2254261A
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US2482198A
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GB608072A
Cited
US2588018A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |