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US3372891A
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Means and method of rotor augmented lift for airplanes
Assignee: MALVESTUTO AERO SPACE
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Filing: 1965-10-22
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Granted: 1968-03-12
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Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Jr Frank S Malvestuto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:35
CPC Classifications
B; B64; B64C; B64C39/00; B64C39/06; B64C23/00; B64C23/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1879857A
Cited
US2461435A
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US3129905A
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US3049320A
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US3033491A
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US3288400A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |