Patent US2565854A successfully refreshed from Google Patents.
US2565854A
Expired / Lapsed
US
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Variable area propelling nozzle
Assignee: Power Jets Research and Development Ltd
•
Filing: 1945-11-26
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Granted: 1951-08-28
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Expires: 1965-11-26
Abstract
No abstract record available.
Inventors
- 👤 Johnstone Alexander Pearce
- 👤 Cohen Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:11
CPC Classifications
E; E21; E21F; E21F1/00; E21F1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US147107A
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US595014A
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US1116741A
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US1572812A
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US1881486A
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US2037663A
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US2280835A
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US2181261A
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US2356557A
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US2408099A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-27 | 1955-02-26 | 1955-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-27 | 1959-02-26 | 1959-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-27 | 1963-02-26 | 1963-08-28 | $7700.00 | Window Closed / Lapsed |