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US2543652A
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US
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Emergency by-pass system
Assignee: Bell Aircraft Corp
•
Filing: 1945-09-12
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Granted: 1951-02-27
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Expires: 1965-09-12
Abstract
No abstract record available.
Inventors
- 👤 Frederick R Weymouth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:59
CPC Classifications
F; F01; F01P; F01P7/00; F01P7/14; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/2496; Y10T137/2544; Y10T137/2554
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1297836A
Cited
US1935119A
Cited
US1961599A
Cited
GB495422A
Cited
US2389555A
Cited
US2404936A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-26 | 1954-08-28 | 1955-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-26 | 1958-08-28 | 1959-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-26 | 1962-08-28 | 1963-02-27 | $7700.00 | Window Closed / Lapsed |