Patent US3429395A successfully refreshed from Google Patents.
US3429395A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-cushion vehicle with flexible skirt
Assignee: Individual
•
Filing: 1966-02-03
•
Granted: 1969-02-25
•
Expires: 1986-02-03
Abstract
No abstract record available.
Inventors
- 👤 Melville W Beardsley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:52
CPC Classifications
B; B60; B60V; B60V1/00; B60V1/04; B60V1/046
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3177959A
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US3150732A
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US3130939A
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US3140687A
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US3174570A
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US3258080A
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US3291237A
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US3291239A
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US3291240A
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US3318404A
Cited
US3275270A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |