US3166642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signaling arrangement
Assignee: AT&T Inc
•
Filing: 1961-12-21
•
Granted: 1965-01-19
•
Expires: 1981-12-21
Abstract
No abstract record available.
Inventors
- 👤 Henry H Abbott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:45
CPC Classifications
H; H04; H04Q; H04Q1/00; H04Q1/18; H04Q1/30; H04Q1/32; H04Q1/36; H03; H03F; H03F3/00; H03F3/62; H04B; H04B3/00; H04B3/02; H04B3/42; H04M; H04M1/00; H04M1/60; H04M19/00; H04M19/001; H04M19/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
IN A TELEPHONE SYSTEM, A CENTRAL ORFFICE, A SUBSCRIBER LINE HAVING A STATION THEREON, AND A DIAL PULSE AND RINGING REPEATER INTERCONNECTING SAID CENTRAL OFFICE AND SAID SUBSCRIBER LINE, SAID REPEATER INCLUDING A SUPERVISORY DETECTOR, DETECTOR CIRCUITRY INCLUDING A LOW VOLTAGE SOURCE AND A RESISTOR, SAID DETECTOR BEING CONNECTED TO SAID RESISTOR, A HIGH VOLTAGE RINGING SOURCE, AND MEANS RESPONSIVE TO A RINGING SIGNAL FROM SAID CENTRAL OFFICE FOR REMOVING SAID LOW VOLTAGE SOURCE FROM SAID DETECTOR CIRCUITRY, FOR INCLUDING SAID HIGH VOLTAGE RINING SOURCE THEREIN, AND FOR CHANGING SAID DETECTOR CIRCUITRY TO MAINTAIN A CONSTANT ELECTRICAL CONDITION AT SAID DETECTOR.
Claim 2
Dependent Claim
101 words
IN A TELEPHONE SYSTEM, A CENTRAL ORFFICE, A SUBSCRIBER LINE HAVING A STATION THEREON, AND A DIAL PULSE AND RINGING REPEATER INTERCONNECTING SAID CENTRAL OFFICE AND SAID SUBSCRIBER LINE, SAID REPEATER INCLUDING A SUPERVISORY DETECTOR, DETECTOR CIRCUITRY INCLUDING A LOW VOLTAGE SOURCE AND A RESISTOR, SAID DETECTOR BEING CONNECTED TO SAID RESISTOR, A HIGH VOLTAGE RINGING SOURCE, AND MEANS RESPONSIVE TO A RINGING SIGNAL FROM SAID CENTRAL OFFICE FOR REMOVING SAID LOW VOLTAGE SOURCE FROM SAID DETECTOR CIRCUITRY, FOR INCLUDING SAID HIGH VOLTAGE RINING SOURCE THEREIN, AND FOR CHANGING SAID DETECTOR CIRCUITRY TO MAINTAIN A CONSTANT ELECTRICAL CONDITION AT SAID DETECTOR.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
US2904641A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-01-19 | 1968-07-20 | 1969-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-01-19 | 1972-07-20 | 1973-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-01-19 | 1976-07-20 | 1977-01-19 | $7700.00 | Window Closed / Lapsed |