US2694503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm safety device
Assignee: Aerojet Rocketdyne Inc
•
Filing: 1948-11-19
•
Granted: 1954-11-16
•
Expires: 1968-11-19
Abstract
No abstract record available.
Inventors
- 👤 Robert B Young
- 👤 Carson E Hawk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:47
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/42; F02K9/44; F02K9/56; F02K9/566
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US929974A
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US1697199A
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US1579141A
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GB216036A
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US1976975A
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US2183208A
Cited
GB513426A
Cited
US2230961A
Cited
GB578008A
Cited
US2437836A
Cited
US2586858A
Cited
US2553267A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-15 | 1958-05-17 | 1958-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-15 | 1962-05-17 | 1962-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-15 | 1966-05-17 | 1966-11-16 | $7700.00 | Window Closed / Lapsed |