US2629084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Echo ranging system
Assignee: Individual
•
Filing: 1944-04-25
•
Granted: 1953-02-17
•
Expires: 1964-04-25
Abstract
No abstract record available.
Inventors
- 👤 Carl H Eckart
- 👤 Jr George W Downs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:33
CPC Classifications
G; G01; G01S; G01S15/00; G01S15/02; G01S15/06; G01S15/08; G01S15/10; G01S15/102; G01S15/104; Y; Y10; Y10S; Y10S367/00; Y10S367/901
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2011392A
Cited
GB368778A
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US2143035A
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US2410066A
Cited
US2410067A
Cited
US2253975A
Cited
US2268587A
Cited
US2492012A
Cited
US2236893A
Cited
US2433361A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-17 | 1956-08-18 | 1957-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-17 | 1960-08-18 | 1961-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-17 | 1964-08-18 | 1965-02-17 | $7700.00 | Window Closed / Lapsed |