Patent US3714918A successfully refreshed from Google Patents.
US3714918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air boat with air cushion
Assignee: Individual
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Filing: 1970-07-06
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Granted: 1973-02-06
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Expires: 1990-07-06
Abstract
Abstract A WATER SURFACE PLANING CRAFT INCLUDING A HULL HAVING A BOTTOM SURFACE PROVIDED WITH A PLURALITY OF AIR OUTLETS OPENING DOWNWARDLY THERETHROUGH. A MOTOR DRIVEN AIR PROPELLER IS CARRIED BY THE HULL FOR DISCHARGING AIR REARWARDLY PROPELLING THE HULL FORWARDLY. FURTHER, STRUCTURE IS PROVIDED FOR TRAPPING AND DUCTING A PORTION OF THE REARWARD DISCHARGE OF AIR FROM PROPELLER TO THE AIR OUTLETS, WHEREBY THE TRAPPED INDUCTED PORTION OF THE REARWARD AIR DISCHARGED FROM THE AIR PROPELLER IS USED TO FORM AT LEAST A PARTIAL BLANKET OF AIR BETWEEN THE BOTTOM SURFACE OF THE HULL AND THE SURFACE OF THE WATER OVER WHICH THE HULL IS MOVING.
Inventors
- 👤 J Veldhuizen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:53
CPC Classifications
B; B60; B60V; B60V1/00; B60V1/04; B60V1/046; B63; B63B; B63B1/00; B63B1/32; B63B1/34; B63B1/38; Y; Y02; Y02T; Y02T70/00; Y02T70/10
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) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |