Patent US3865484A successfully refreshed from Google Patents.
Patent US3053480A successfully refreshed from Google Patents.
US3053480A
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Omni-directional, vertical-lift, helicopter drone
Assignee: Piasecki Aircraft Corp
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Filing: 1959-10-06
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Granted: 1962-09-11
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Expires: 1979-10-06
Abstract
No abstract record available.
Inventors
- 👤 Edward G Vanderlip
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:52
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/54; B64U; B64U10/00; B64U10/10; B64U10/13; B64U10/14; B64U30/00; B64U30/20; B64U30/29; B64U30/293; B64U30/296; B64U30/297; B64U2101/00; B64U2101/30; B64U2201/00; B64U2201/20; B64U50/00; B64U50/10; B64U50/11
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2549886A
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US2845239A
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US2556345A
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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) | 1965-09-10 | 1966-03-12 | 1966-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-10 | 1970-03-12 | 1970-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-10 | 1974-03-12 | 1974-09-11 | $7700.00 | Window Closed / Lapsed |