US2990029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable area jet propulsion nozzles
Assignee: Rolls Royce PLC
•
Filing: 1957-03-15
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Granted: 1961-06-27
•
Expires: 1977-03-15
Abstract
No abstract record available.
Inventors
- 👤 Keen John Michael Storer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:35
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/46; F02K1/48; F02K1/06; F02K1/12; F02K1/1207
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2420323A
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US2496509A
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US2669834A
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US2569497A
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US2865165A
Cited
FR1111867A
Cited
GB768553A
Cited
FR1102597A
Cited
GB781661A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |