US3381650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amphibious vehicle having the driving and floating screw rotors on its both sides
Assignee: IHI Corp
•
Filing: 1966-09-26
•
Granted: 1968-05-07
•
Expires: 1986-09-26
Abstract
No abstract record available.
Inventors
- 👤 Itoh Isamu
- 👤 Imamura Kiyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:51
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/02; B63B1/10; B60; B60F; B60F3/00; B60F3/0007; B60F3/0023; B62; B62D; B62D57/00; B62D57/02; B62D57/036; B63H; B63H1/00; B63H1/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2495643A
Cited
US3250239A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-07 | 1971-11-06 | 1972-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-07 | 1975-11-06 | 1976-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-07 | 1979-11-06 | 1980-05-07 | $7700.00 | Window Closed / Lapsed |