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Patent US2440292A successfully refreshed from Google Patents.
US2440292A
Expired / Lapsed
US
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Rotor equipped aerial device
Assignee: Autogiro Company of America
•
Filing: 1944-05-05
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Granted: 1948-04-27
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Expires: 1964-05-05
Abstract
No abstract record available.
Inventors
- 👤 Harold F Pitcairn
- 👤 Paul H Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:59
CPC Classifications
F; F42; F42B; F42B10/00; F42B10/32; F42B10/48; F42B10/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1435190A
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US1537713A
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US1811867A
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US1804869A
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US1799664A
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US1964016A
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US2068616A
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US2044819A
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DE660793C
Cited
US2181477A
Cited
US2192492A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-27 | 1951-10-27 | 1952-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-27 | 1955-10-27 | 1956-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-27 | 1959-10-27 | 1960-04-27 | $7700.00 | Window Closed / Lapsed |