Patent US2590457A successfully refreshed from Google Patents.
US2590457A
Expired / Lapsed
US
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Jet propulsion device for airscrews or rotary wings
Assignee: Sigma
•
Filing: 1947-04-09
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Granted: 1952-03-25
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Expires: 1967-04-09
Abstract
No abstract record available.
Inventors
- 👤 Pouit Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:34
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/04; B64C27/12; B64C27/16; B64C27/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB227151A
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FR648107A
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US2292288A
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US2330056A
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US2408788A
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US2421518A
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US2411227A
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US2397357A
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GB557011A
Cited
GB556866A
Cited
US2429646A
Cited
US2443717A
Cited
US2438151A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-25 | 1955-09-24 | 1956-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-25 | 1959-09-24 | 1960-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-25 | 1963-09-24 | 1964-03-25 | $7700.00 | Window Closed / Lapsed |