US3398712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible skirts for air cushion vehicles
Assignee: Westland Group PLC
•
Filing: 1966-08-22
•
Granted: 1968-08-27
•
Expires: 1986-08-22
Abstract
No abstract record available.
Inventors
- 👤 Hardy Derek James
- 👤 Riddle Lavis Albert Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:43
CPC Classifications
B; B60; B60V; B60V1/00; B60V1/16
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2598207A
Cited
US2960281A
Cited
GB935620A
Cited
US3253666A
Cited
US3269349A
Cited
US3275270A
Cited
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 |