Patent US3411737A successfully refreshed from Google Patents.
US3411737A
Expired / Lapsed
US
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Helicopter
Assignee: Individual
•
Filing: 1966-08-24
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Granted: 1968-11-19
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Expires: 1986-08-24
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Godwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:20
CPC Classifications
B; B64; B64C; B64C25/00; B64C25/32; B64C25/52; B64C27/00; B64C27/04; B64C27/08; B64C27/10; B64C2025/325
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR1356307A
Cited
US1527666A
Cited
GB248065A
Cited
US1849235A
Cited
GB755629A
Cited
US2847173A
Cited
US2936971A
Cited
FR1256015A
Cited
US3173632A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-19 | 1972-05-20 | 1972-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-19 | 1976-05-20 | 1976-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-19 | 1980-05-20 | 1980-11-19 | $7700.00 | Window Closed / Lapsed |