US2673696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helicopter having a jet-driven rotor system
Assignee: Autogiro Company of America
•
Filing: 1947-05-20
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Granted: 1954-03-30
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Expires: 1967-05-20
Abstract
No abstract record available.
Inventors
- 👤 Pullin Cyril George
- 👤 Shapiro Jacob Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:39
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)
FR409379A
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FR423590A
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GB227151A
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GB293594A
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US2142601A
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US2073298A
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US2240846A
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US2330056A
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FR859640A
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FR865452A
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US2377607A
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GB557011A
Cited
US2340954A
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US2485502A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-29 | 1957-09-28 | 1958-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-29 | 1961-09-28 | 1962-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-29 | 1965-09-28 | 1966-03-30 | $7700.00 | Window Closed / Lapsed |