Patent US2502154A successfully refreshed from Google Patents.
US2502154A
Expired / Lapsed
US
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Carrier shift receiving system
Assignee: Individual
•
Filing: 1945-02-15
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Granted: 1950-03-28
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Expires: 1965-02-15
Abstract
No abstract record available.
Inventors
- 👤 Charles L Jeffers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:23
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/10; H04L27/14; H04J; H04J9/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2103847A
Cited
US2357984A
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US2165502A
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US2098286A
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US2084647A
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US2129085A
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US2121287A
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US2211750A
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US2282971A
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US2356224A
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US2352918A
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US2378298A
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US2407863A
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US2403011A
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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) | 1953-03-27 | 1953-09-26 | 1954-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-27 | 1957-09-26 | 1958-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-27 | 1961-09-26 | 1962-03-28 | $7700.00 | Window Closed / Lapsed |