US3131258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regenerative detector for frequencyshift data signals
Assignee: AT&T Inc
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Filing: 1961-12-21
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Granted: 1964-04-28
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Expires: 1981-12-21
Abstract
No abstract record available.
Inventors
- 👤 Jr John F O'neill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:40
CPC Classifications
H; H03; H03D; H03D1/00; H03D1/14; H03D1/18; H04; H04L; H04L27/00; H04L27/02; H04L27/08; H04L27/10; H04L27/14; H04L27/144
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
A DETECTOR FOR DAMPED ALTERNATING-CURRENT SIGNAL WAVE BURSTS COMPRISING A SOURCE OF SAID SIGNAL WAVES HAVING DECREASING PEAK AMPLITUDES WITHIN EACH BURST, A TUNED DETECTOR CIRCUIT RESPONSIVE TO SAID SIGNAL WAVES HAVING AN OPERATING THRESHOLD LEVEL BELOW THE INITIAL PEAK AMPLITUDE OF SAID SIGNAL WAVE BURSTS, AN INPUT TERMINAL FOR SAID DETECTOR, A REFERENCE BIAS SOURCE FOR ESTABLISHING SAID THRESHOLD LEVEL WITH RESPECT TO SAID INPUT TERMINAL, AN OUTPUT TERMINAL FOR SAID DETECTOR,
Claim 2
Dependent Claim
73 words
A DETECTOR FOR DAMPED ALTERNATING-CURRENT SIGNAL WAVE BURSTS COMPRISING A SOURCE OF SAID SIGNAL WAVES HAVING DECREASING PEAK AMPLITUDES WITHIN EACH BURST, A TUNED DETECTOR CIRCUIT RESPONSIVE TO SAID SIGNAL WAVES HAVING AN OPERATING THRESHOLD LEVEL BELOW THE INITIAL PEAK AMPLITUDE OF SAID SIGNAL WAVE BURSTS, AN INPUT TERMINAL FOR SAID DETECTOR, A REFERENCE BIAS SOURCE FOR ESTABLISHING SAID THRESHOLD LEVEL WITH RESPECT TO SAID INPUT TERMINAL, AN OUTPUT TERMINAL FOR SAID DETECTOR,
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |