Patent US3379270A successfully refreshed from Google Patents.
US3379270A
Expired / Lapsed
US
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Vessel convertible to watercraft and air cushion vehicle
Assignee: Westland Group PLC
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Filing: 1965-10-11
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Granted: 1968-04-23
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Expires: 1985-10-11
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
2026-10-23 18:48
CPC Classifications
B; B60; B60V; B60V3/00; B60V3/06; B60V1/00; B60V1/04
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) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |