US3587771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ground-effect machines propelled by air or gas streams
Assignee: Societe dEtudes et de Developpement des Aeroglisseurs Marins SEDAM SA
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Filing: 1969-07-14
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Granted: 1971-06-28
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Expires: 1989-07-14
Abstract
Abstract IN A GROUND EFFECT MACHINE HAVING A CENTRAL LIFT CHAMBER FOR ONE OR MORE PRESSURE-FLUID CUSHIONS, SUPPLIED WITH PRESSURE FLUID BY PRESSURE-FLUID GENERATOR, AND ONE OR MORE FURTHER PRESSURE-FLUID GENERATORS EACH HAVING A DELIVERY DUCT HAVING AN ADJUSTABLE CROSS SECTION EJECTION NOZZLE FOR DRIVING THE MACHINE, THE IMPROVEMENT COMPRISING ONE OR MORE ORI- FICES CONNECTING THE LIFT CHAMBER WITH THE DELIVERY DUCT OR DUCTS, AND/OR INTERCONNECTING THE DELIVERY DUCTS, FOR MAINTAINING THE LIFT AND DRIVE OF THE MACHINE IN THE EVENT OF FAILURE OF ALL PRESSURE-FLUID GENERATORS BUT ONE.
Inventors
- 👤 Marc Henri Jean Faure
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:40
CPC Classifications
B; B60; B60V; B60V1/00; B60V1/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |