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Patent US2067228A successfully refreshed from Google Patents.
US2067228A
Expired / Lapsed
US
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Rotary sustaining wings for aircraft
Assignee: Autogiro Company of America
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Filing: 1934-05-22
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Granted: 1937-01-12
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Expires: 1954-05-22
Abstract
No abstract record available.
Inventors
- 👤 Bennett James Allan Jamieson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:39
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/02; B64C27/021
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) | 1940-01-12 | 1940-07-13 | 1941-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-01-12 | 1944-07-13 | 1945-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-01-12 | 1948-07-13 | 1949-01-12 | $7700.00 | Window Closed / Lapsed |