Patent US2637405A successfully refreshed from Google Patents.
US2637405A
Expired / Lapsed
US
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Lightweight structure for aircraft sustaining rotor blades
Assignee: Autogiro Company of America
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Filing: 1947-03-22
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Granted: 1953-05-05
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Expires: 1967-03-22
Abstract
No abstract record available.
Inventors
- 👤 Paul H Stanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:06
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32; B64C27/46; B64C27/473
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1444959A
Cited
US1282940A
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US1429600A
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US1969781A
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US2067228A
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US2070657A
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US2152861A
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US2155375A
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FR838828A
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US2243432A
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US2303707A
Cited
US2272439A
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US2414125A
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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) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |