Patent US2487995A successfully refreshed from Google Patents.
US2487995A
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US
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Pulse echo receiver with regenerative feedback
Assignee: Individual
•
Filing: 1941-05-26
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Granted: 1949-11-15
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Expires: 1961-05-26
Abstract
No abstract record available.
Inventors
- 👤 Samuel M Tucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:45
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/28; G01S7/285; G01S7/292; G01S7/2923; G01S7/2926
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB480572A
Cited
US2203634A
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US2227598A
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US2236015A
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US2225524A
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US2227057A
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US2212173A
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US2255839A
Cited
US2310692A
Cited
US2221666A
Cited
US2361437A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-14 | 1953-05-16 | 1953-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-14 | 1957-05-16 | 1957-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-14 | 1961-05-16 | 1961-11-15 | $7700.00 | Window Closed / Lapsed |