Patent US5257195A successfully refreshed from Google Patents.
US2453970A
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Recognition system for pulse echo radio locators
Assignee: RCA Corp
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Filing: 1941-05-31
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Granted: 1948-11-16
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Expires: 1961-05-31
Abstract
No abstract record available.
Inventors
- 👤 George M Charrier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:23
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/74; G01S13/76; G01S13/78
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2144337A
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US2212110A
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US2134716A
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US2134562A
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US2157122A
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US2207267A
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US2189549A
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US2252083A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-11-16 | 1952-05-17 | 1952-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-11-16 | 1956-05-17 | 1956-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-11-16 | 1960-05-17 | 1960-11-16 | $7700.00 | Window Closed / Lapsed |