Patent US4822759A successfully refreshed from Google Patents.
Patent US4257007A successfully refreshed from Google Patents.
Patent US4960096A successfully refreshed from Google Patents.
Patent US4169341A successfully refreshed from Google Patents.
Patent US3401766A successfully refreshed from Google Patents.
US3401766A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-cushion vehicle
Assignee: AIRCARS Inc
•
Filing: 1964-11-02
•
Granted: 1968-09-17
•
Expires: 1984-11-02
Abstract
No abstract record available.
Inventors
- 👤 Harry A Laufman
- 👤 Donald W Stillman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:37
CPC Classifications
B; B60; B60V; B60V1/00; B60V1/14; B60V1/15; B60V1/04; B60V1/043; B60V1/11; B60V1/115
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2339886A
Cited
US2384441A
Cited
US2487297A
Cited
US2883233A
Cited
US3177959A
Cited
US3118513A
Cited
US3073549A
Cited
US3172494A
Cited
US3168928A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-17 | 1972-03-18 | 1972-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-17 | 1976-03-18 | 1976-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-17 | 1980-03-18 | 1980-09-17 | $7700.00 | Window Closed / Lapsed |