Patent US3479600A successfully refreshed from Google Patents.
US3479600A
Expired / Lapsed
US
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Automatic frequency control system for controlling the frequency of the local oscillator used in a differential phase modulated pcm receiver
Assignee: AT&T Inc
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Filing: 1966-10-05
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Granted: 1969-11-18
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Expires: 1986-10-05
Abstract
No abstract record available.
Inventors
- 👤 Stewart E Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:51
CPC Classifications
H; H03; H03J; H03J7/00; H03J7/02; H03J7/04; H04; H04L; H04L27/00; H04L27/18; H04L27/22; H04L27/233; H04L27/2331
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3181122A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-11-17 | 1973-05-19 | 1973-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-11-17 | 1977-05-19 | 1977-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-11-17 | 1981-05-19 | 1981-11-18 | $7700.00 | Window Closed / Lapsed |