US3204715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal for air cushion vehicles and the like
Assignee: Individual
•
Filing: 1961-03-10
•
Granted: 1965-09-07
•
Expires: 1981-03-10
Abstract
No abstract record available.
Inventors
- 👤 Ralph P Maloof
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:42
CPC Classifications
B; B60; B60V; B60V1/00; B60V1/04; B60V1/046; B60V1/14; B60V1/145
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
61 words
IN COMBINATION WITH AN AIR CUSHION VEHICLE HAVING DEPENDING SIDE WALLS DEFINING A PLENUM CHAMBER THEREBETWEEN AND SAID PLENUM CHAMBER OPENING AT THE END OF THE VEHICLE, A SEAL FOR SAID OPENING AND FOR OPERATION OVER AN IRREGULAR SUPPORTING SURFACE AND INCLUDING, A DISCSHAPED ELEMENT ROTATABLY CARRIED ON AN AXIS EXTENDING BETWEEN THE SIDE WALLS AND PARALLEL TO SAID SURFACE AND
References Cited (Backward Citations)
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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) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |