Patent US3131888A successfully refreshed from Google Patents.
US3131888A
Expired / Lapsed
US
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Amphibious helicopter with detachable hull
Assignee: Eltra Corp
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Filing: 1962-07-11
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Granted: 1964-05-05
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Expires: 1982-07-11
Abstract
No abstract record available.
Inventors
- 👤 James R Jensen
- 👤 Donald R Jacoby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:50
CPC Classifications
B; B64; B64C; B64C25/00; B64C25/32; B64C25/52; B64C1/00; B64C2025/325; B64C2211/00; B64C27/00; B64C27/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
AN AMPHIBIOUS HELICOPTER COMPRISING A CHASSIS, A ROTOR PROJECTING ABOVE SAID CHASSIS, MEANS FOR ROTATING SAID ROTOR TO PROPEL SAID HELICOPTER IN FLIGHT, LANDING GEAR STRUCTURE OPERATIVELY FIXED TO THE UNDERSIDE OF SAID CHASSIS AND DEPENDING THEREFROM ON OPPOSITE SIDES OF SAID HELICOPTER FOR SUPPORTING SAID HELICOPTER ON THE GROUND, A BUOYANT HULL ON THE UNDERSIDE OF SAID CHASSIS CONFORMING CLOSELY TO THE CONTOUR OF SAID CHASSIS UNDERSIDE FOR SUP-
Claim 2
Dependent Claim
70 words
AN AMPHIBIOUS HELICOPTER COMPRISING A CHASSIS, A ROTOR PROJECTING ABOVE SAID CHASSIS, MEANS FOR ROTATING SAID ROTOR TO PROPEL SAID HELICOPTER IN FLIGHT, LANDING GEAR STRUCTURE OPERATIVELY FIXED TO THE UNDERSIDE OF SAID CHASSIS AND DEPENDING THEREFROM ON OPPOSITE SIDES OF SAID HELICOPTER FOR SUPPORTING SAID HELICOPTER ON THE GROUND, A BUOYANT HULL ON THE UNDERSIDE OF SAID CHASSIS CONFORMING CLOSELY TO THE CONTOUR OF SAID CHASSIS UNDERSIDE FOR SUP-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-05 | 1967-11-04 | 1968-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-05 | 1971-11-04 | 1972-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-05 | 1975-11-04 | 1976-05-05 | $7700.00 | Window Closed / Lapsed |