Patent FR581751A successfully refreshed from Google Patents.
US2563899A
Expired / Lapsed
US
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Pressure responsive device
Assignee: Aerojet Rocketdyne Inc
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Filing: 1947-05-31
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Granted: 1951-08-14
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Expires: 1967-05-31
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Wiancko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:20
CPC Classifications
G; G01; G01L; G01L9/00; G01L9/0026; G01L9/0029
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR398234A
Cited
US1156862A
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US2224709A
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US2260837A
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US2408524A
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US2398666A
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US2430757A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |