Patent FR1030690A successfully refreshed from Google Patents.
US2516587A
Expired / Lapsed
US
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Correction of errors in pulse code communication
Assignee: AT&T Inc
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Filing: 1947-12-03
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Granted: 1950-07-25
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Expires: 1967-12-03
Abstract
No abstract record available.
Inventors
- 👤 Peterson Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:03
CPC Classifications
H; H04; H04B; H04B14/00; H04B14/02; H04B14/04; H04B14/046
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2272070A
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US2313209A
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US2430139A
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US2404356A
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US2438908A
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US2437707A
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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) | 1953-07-24 | 1954-01-23 | 1954-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-24 | 1958-01-23 | 1958-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-24 | 1962-01-23 | 1962-07-25 | $7700.00 | Window Closed / Lapsed |