Patent US3161537A successfully refreshed from Google Patents.
US2460316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Echo ranging and listening gear
Assignee: Individual
•
Filing: 1944-07-31
•
Granted: 1949-02-01
•
Expires: 1964-07-31
Abstract
No abstract record available.
Inventors
- 👤 Horace M Trent
- 👤 Thomas F Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:41
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/72; Y; Y10; Y10S; Y10S367/00; Y10S367/901
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB180646A
Cited
US1709573A
Cited
US2009459A
Cited
US2032893A
Cited
US2131993A
Cited
US2108090A
Cited
US2103090A
Cited
US2235385A
Cited
US2329570A
Cited
US2284850A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-01 | 1952-08-02 | 1953-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-01 | 1956-08-02 | 1957-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-01 | 1960-08-02 | 1961-02-01 | $7700.00 | Window Closed / Lapsed |