Patent US2612857A successfully refreshed from Google Patents.
US2612857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torpedo hull
Assignee: Vinters Armstrongs Ltd
•
Filing: 1947-04-26
•
Granted: 1952-10-07
•
Expires: 1967-04-26
Abstract
No abstract record available.
Inventors
- 👤 Wilkinson William Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:24
CPC Classifications
F; F42; F42B; F42B19/00; F42B19/005
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US122656A
Cited
US1318956A
Cited
GB190111534A
Cited
US800408A
Cited
US1281967A
Cited
DE386865C
Cited
DE435562C
Cited
US1627155A
Cited
US1812010A
Cited
US2052475A
Cited
US2337584A
Cited
US2401453A
Cited
US2405001A
Cited
GB597365A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-10-07 | 1956-04-07 | 1956-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-07 | 1960-04-07 | 1960-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-07 | 1964-04-07 | 1964-10-07 | $7700.00 | Window Closed / Lapsed |