US2972974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrofoil craft
Assignee: Individual
•
Filing: 1956-07-23
•
Granted: 1961-02-28
•
Expires: 1976-07-23
Abstract
No abstract record available.
Inventors
- 👤 Harold E Follett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:02
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/16; B63B1/24; B63B1/242
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2073864A
Cited
US2186060A
Cited
FR863288A
Cited
US2438493A
Cited
US2625350A
Cited
US2703063A
Cited
US2715000A
Cited
US2814811A
Cited
US2751612A
Cited
US2795202A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-28 | 1964-08-29 | 1965-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-28 | 1968-08-29 | 1969-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-28 | 1972-08-29 | 1973-02-28 | $7700.00 | Window Closed / Lapsed |