Patent US3133155A successfully refreshed from Google Patents.
US3133155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal converter circuit
Assignee: AT&T Inc
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Filing: 1960-09-27
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Granted: 1964-05-12
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Expires: 1980-09-27
Abstract
No abstract record available.
Inventors
- 👤 Francis C Kuchas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:53
CPC Classifications
H; H04; H04Q; H04Q3/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
IN A TELEPHONE SWITCHING SYSSTEM, A CONVERTER CIRCUIT FOR PROCESSING CALL SIGNALS FOR SUBSCRIBER STATIONS HAVING EITHER MULTIFREQUENCY CALL SIGNALING FACILITIES OR DIAL PULSE CALL SIGNALING FACILITIES, SAID CONVERTER COMPRISING IN COMBINATION REGISTER MEANS, MEANS RESPONSIVE TO MULTIFREQUENCY CALL SIGNALS FROM SAID SUBSCRIBER STATIONS FOR STORING SAID CALL SIGNALS IN SAID REGISTER MEANS, MEANS FOR CONVERTING SAID STORED CALL SIGNALS TO DIAL PULSE SIGNALS, MEANS FOR TRANSMITTING SAID DIAL PULSE SIGNALS TO SWITCHING APPARATUS OF SAID SWITCHING SYSTEM, MEANS FOR RECOGNIZING DIAL PULSE CALL SIGNALS FROM SAID SUBSCRIBER STATIONS, AND CONTROL MEANS RESPONSIVE TO SAID RECOGNIZING MEANS FOR RELEASING SAID CONVERTER CIRCUIT.
Claim 2
Dependent Claim
102 words
IN A TELEPHONE SWITCHING SYSSTEM, A CONVERTER CIRCUIT FOR PROCESSING CALL SIGNALS FOR SUBSCRIBER STATIONS HAVING EITHER MULTIFREQUENCY CALL SIGNALING FACILITIES OR DIAL PULSE CALL SIGNALING FACILITIES, SAID CONVERTER COMPRISING IN COMBINATION REGISTER MEANS, MEANS RESPONSIVE TO MULTIFREQUENCY CALL SIGNALS FROM SAID SUBSCRIBER STATIONS FOR STORING SAID CALL SIGNALS IN SAID REGISTER MEANS, MEANS FOR CONVERTING SAID STORED CALL SIGNALS TO DIAL PULSE SIGNALS, MEANS FOR TRANSMITTING SAID DIAL PULSE SIGNALS TO SWITCHING APPARATUS OF SAID SWITCHING SYSTEM, MEANS FOR RECOGNIZING DIAL PULSE CALL SIGNALS FROM SAID SUBSCRIBER STATIONS, AND CONTROL MEANS RESPONSIVE TO SAID RECOGNIZING MEANS FOR RELEASING SAID CONVERTER CIRCUIT.
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) | 1967-05-12 | 1967-11-11 | 1968-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-12 | 1971-11-11 | 1972-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-12 | 1975-11-11 | 1976-05-12 | $7700.00 | Window Closed / Lapsed |