US2651480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple rotor helicopter
Assignee: Autogiro Company of America
•
Filing: 1946-07-29
•
Granted: 1953-09-08
•
Expires: 1966-07-29
Abstract
No abstract record available.
Inventors
- 👤 Pullin Cyril George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:57
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/04; B64C27/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190325378A
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US1350982A
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FR637938A
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US1783011A
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US1842250A
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US1783458A
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US1844786A
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US2233747A
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US2337570A
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US2321572A
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US2318260A
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US2360988A
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US2390334A
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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) | 1956-09-07 | 1957-03-09 | 1957-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-07 | 1961-03-09 | 1961-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-07 | 1965-03-09 | 1965-09-08 | $7700.00 | Window Closed / Lapsed |