US2857739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for turbo-jet engine
Assignee: Pratt and Whitney Co Inc
•
Filing: 1951-04-06
•
Granted: 1958-10-28
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Expires: 1971-04-06
Abstract
No abstract record available.
Inventors
- 👤 Alexander M Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:23
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/06; F02K1/15; F02K1/16; F02K1/17; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2581275A
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US2581276A
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US2580962A
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GB626297A
Cited
US2566373A
Cited
FR941556A
Cited
US2576352A
Cited
US2516909A
Cited
US2573724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-27 | 1962-04-28 | 1962-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-27 | 1966-04-28 | 1966-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-27 | 1970-04-28 | 1970-10-28 | $7700.00 | Window Closed / Lapsed |