Patent US2714887A successfully refreshed from Google Patents.
US2915747A
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US
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Echo ranging system
Assignee: Raytheon Co
•
Filing: 1950-10-05
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Granted: 1959-12-01
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Expires: 1970-10-05
Abstract
No abstract record available.
Inventors
- 👤 Carl A Segerstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:57
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/28; G01S13/00; G01S13/66; G01S13/70
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2737652A
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US2538027A
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US2543072A
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US2516356A
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US2436663A
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US2517540A
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US2461144A
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US2468703A
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US2461871A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |