US3398809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-cushioned and ground-engaging vehicle
Assignee: Individual
•
Filing: 1966-10-19
•
Granted: 1968-08-27
•
Expires: 1986-10-19
Abstract
No abstract record available.
Inventors
- 👤 Kenneth G Wood
- 👤 Walter A Crowley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:18
CPC Classifications
B; B60; B60V; B60V1/00; B60V1/04; B60V1/043; B60V1/11; B60V1/115; B60V1/16
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 |