Patent US2448787A successfully refreshed from Google Patents.
US2448787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for detecting and locating enemy vessels
Assignee: FERREL IND Inc
•
Filing: 1944-08-18
•
Granted: 1948-09-07
•
Expires: 1964-08-18
Abstract
No abstract record available.
Inventors
- 👤 Clyde B Ferrel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:28
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/72
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1308003A
Cited
US1610779A
Cited
US1428337A
Cited
DE596439C
Cited
US2177493A
Cited
US2361177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-07 | 1952-03-08 | 1952-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-07 | 1956-03-08 | 1956-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-07 | 1960-03-08 | 1960-09-07 | $7700.00 | Window Closed / Lapsed |