US1921839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft having freely rotative sustaining wings
Assignee: Autogiro Company of America
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Filing: 1932-10-29
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Granted: 1933-08-08
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Expires: 1952-10-29
Abstract
No abstract record available.
Inventors
- 👤 Arthur H C A Rawson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:40
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/02; B64C27/021; B64C27/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1936-08-07 | 1937-02-06 | 1937-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-08-07 | 1941-02-06 | 1941-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-08-07 | 1945-02-06 | 1945-08-08 | $7700.00 | Window Closed / Lapsed |