Patent US2942810A successfully refreshed from Google Patents.
US2942810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrofoil craft
Assignee: Individual
•
Filing: 1955-05-31
•
Granted: 1960-06-28
•
Expires: 1975-05-31
Abstract
No abstract record available.
Inventors
- 👤 Hanning-Lee Francis Edward
- 👤 Hanning-Lee Stella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:59
CPC Classifications
B; B64; B64C; B64C35/00; B63; B63B; B63B1/00; B63B1/32; B63B1/322; Y; Y02; Y02T; Y02T70/00; Y02T70/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB318858A
Cited
DE517518C
Cited
US1995089A
Cited
GB582985A
Cited
US2533925A
Cited
GB588315A
Cited
US2597048A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |