Patent US2850226A successfully refreshed from Google Patents.
US2850226A
Expired / Lapsed
US
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Gas turbine engine with air flow modulating means
Assignee: Curtiss Wright Corp
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Filing: 1954-09-28
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Granted: 1958-09-02
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Expires: 1974-09-28
Abstract
No abstract record available.
Inventors
- 👤 Wilton G Lundquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:03
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/40; F04D29/52; F04D29/522; F04D29/524; F02; F02C; F02C9/00; F02C9/16; F02C9/20; F04D27/00; F04D27/02; F04D27/0253
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US127915A
Cited
FR600436A
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US1835811A
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US2613029A
Cited
FR951944A
Cited
FR1010604A
Cited
US2570847A
Cited
US2689680A
Cited
US2705590A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |