US2831321A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable area exhaust nozzle
Assignee: MARQUARDT AIRCRAFT CO
•
Filing: 1954-07-30
•
Granted: 1958-04-22
•
Expires: 1974-07-30
Abstract
No abstract record available.
Inventors
- 👤 Richard G Laucher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 02:25
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/06; F02K1/12; F02K1/1207; F02K1/1261; F05; F05D; F05D2260/00; F05D2260/15; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US186310A
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US2462953A
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US2693078A
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US2603062A
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US2637163A
Cited
US2682147A
Cited
GB711941A
Cited
US2770944A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-21 | 1961-10-21 | 1962-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-21 | 1965-10-21 | 1966-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-21 | 1969-10-21 | 1970-04-22 | $7700.00 | Window Closed / Lapsed |