Patent US3412956A successfully refreshed from Google Patents.
US3412956A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle for travelling over land and/or water
Assignee: Hovercraft Development Ltd
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Filing: 1960-03-22
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Granted: 1968-11-26
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Expires: 1980-03-22
Abstract
No abstract record available.
Inventors
- 👤 Cockerell Christopher Sydney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:03
CPC Classifications
B; B60; B60V; B60V3/00; B60V3/08; B60V1/00; B60V1/04; B60V1/043; B60V1/046; B60V1/11; B60V1/115
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
123 words
A VEHICLE FOR HOVERING OR TRAVELLING OVER LAND AND/OR WATER COMPRISING MEANS WHICH IN OPERATION PRODUCE AND CONTAIN A PRESSURISED CUSHION OF GAS UNDERNEATH THE VEHICLE FOR AT LEAST PARTLY SUPPORTING THE VEHICLE ABOVE THE SURFACE OVER WHICH IT IS ADAPTED TO HOVER OR TRAVEL, AND MEANS FOR SUBDIVIDING THE SAID CUSHION INTO A PLURALITY OF GAS-CONTAINING COMPARTMENTS WHICH DIFFERENT GAS PRESSURES CAN BE PRODUCED, AT LEAST TWO OF SAID COMPARTMENTS BEING POSITIONED ALONG THE PERIPHERY OF SAID CUSHION ON OPPOSITE SIDERS OF THE FORE AND AFT CENTRE LINE OF THE VEHICLE, AND AT LEAST TWO OF SAID COMPARTMENTS BEING SO POSITIONED THAT THEIR CENTRES OF PRESSURE LIE ON OPPOSITE SIDES OF A TRANSVERSE AXIS THROUGH THE CENTRE OF GRAVITY OF SAID VEHICLE.
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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) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |