Patent US3398713A successfully refreshed from Google Patents.
US3398713A
Expired / Lapsed
US
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Tractive air cushion vehicle
Assignee: General Dynamics Corp
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Filing: 1966-08-24
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Granted: 1968-08-27
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Expires: 1986-08-24
Abstract
No abstract record available.
Inventors
- 👤 Arnold M Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:07
CPC Classifications
B; B60; B60V; B60V3/00; B60V3/02; B60V1/00; B60V1/11; B60V1/115
Claims Analysis
Total Claims: 0
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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) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |