Patent US2694868A successfully refreshed from Google Patents.
US2694868A
Expired / Lapsed
US
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Echo repeater
Assignee: Individual
•
Filing: 1943-08-03
•
Granted: 1954-11-23
•
Expires: 1963-08-03
Abstract
No abstract record available.
Inventors
- 👤 Edwin M Mcmillan
- 👤 William A Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:46
CPC Classifications
G; G01; G01S; G01S15/00; G01S15/74
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1785307A
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US2009451A
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US2138036A
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FR762121A
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US2043416A
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US2311445A
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US2536771A
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US2366800A
Cited
US2361177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-22 | 1958-05-24 | 1958-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-22 | 1962-05-24 | 1962-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-22 | 1966-05-24 | 1966-11-23 | $7700.00 | Window Closed / Lapsed |