US2684829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valve diaphragm
Assignee: Boeing North American Inc
•
Filing: 1951-03-07
•
Granted: 1954-07-27
•
Expires: 1971-03-07
Abstract
No abstract record available.
Inventors
- 👤 Jr Rolland Mcfarland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:29
CPC Classifications
F; F16; F16K; F16K7/00; F16K7/12; F16K7/126
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US63648A
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US785116A
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US1288389A
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US1783281A
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US1853156A
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FR684106A
Cited
DE614351C
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US2242582A
Cited
US2283369A
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GB560633A
Cited
US2397373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-07-26 | 1958-01-25 | 1958-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-26 | 1962-01-25 | 1962-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-26 | 1966-01-25 | 1966-07-27 | $7700.00 | Window Closed / Lapsed |