US3120579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone alarm reporting system
Assignee: AT&T Inc
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Filing: 1962-05-28
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Granted: 1964-02-04
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Expires: 1982-05-28
Abstract
No abstract record available.
Inventors
- 👤 John H Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:42
CPC Classifications
H; H04; H04M; H04M11/00; H04M11/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
IN A TELEPHONE SYSTEM, A SUBSCRIBER''S STATION, A CENTRAL OFFICE, A TELEPHONE SET PROVIDED WITH PULSING MEANS AT SAID SUBSCRIBER''S STATION, A FIRST PATH AND A SECOND PATH AT SAID CENTRAL OFFICE, MEANS EFFECTIVE UPON CLOSURE OF THE LINE LOOP THROUGH SAID TELEPHONE SET FOR ESTABLISHING A CONNECTION BETWEEN SAID SUBSCRIBER''S STATION AND SAID CENTRAL OFFICE, MEANS EFFECTIVE UPON SAID CLOSED LOOP REMAINING UNINTERRUPTED BY SAID PULSING MEANS FOR A WAITING INTERVAL OF A PREDETERMINED, DEFINITE EXTENT FOR ROUTING THE CONNECTION TO SAID FIRST PATH, MEANS AT SAID SUBSCRIBER''S STATION FOR INDICATING AN ABNORMAL ALARM CONDITION, MEANS EFFECTIVE UPON OPERATION OF SAID INDICATING MEANS FOR REDUCING THE EXTENT OF THE WAITING INTERVAL, AND MEANS EFFECTIVE DURING THE REDUCED WAITING INTERVAL FOR ROUTING THE ALARM CONDITION INDICATION TO SAID SECOND PATH.
Claim 2
Dependent Claim
130 words
IN A TELEPHONE SYSTEM, A SUBSCRIBER''S STATION, A CENTRAL OFFICE, A TELEPHONE SET PROVIDED WITH PULSING MEANS AT SAID SUBSCRIBER''S STATION, A FIRST PATH AND A SECOND PATH AT SAID CENTRAL OFFICE, MEANS EFFECTIVE UPON CLOSURE OF THE LINE LOOP THROUGH SAID TELEPHONE SET FOR ESTABLISHING A CONNECTION BETWEEN SAID SUBSCRIBER''S STATION AND SAID CENTRAL OFFICE, MEANS EFFECTIVE UPON SAID CLOSED LOOP REMAINING UNINTERRUPTED BY SAID PULSING MEANS FOR A WAITING INTERVAL OF A PREDETERMINED, DEFINITE EXTENT FOR ROUTING THE CONNECTION TO SAID FIRST PATH, MEANS AT SAID SUBSCRIBER''S STATION FOR INDICATING AN ABNORMAL ALARM CONDITION, MEANS EFFECTIVE UPON OPERATION OF SAID INDICATING MEANS FOR REDUCING THE EXTENT OF THE WAITING INTERVAL, AND MEANS EFFECTIVE DURING THE REDUCED WAITING INTERVAL FOR ROUTING THE ALARM CONDITION INDICATION TO SAID SECOND PATH.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-02-03 | 1967-08-05 | 1968-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-03 | 1971-08-05 | 1972-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-03 | 1975-08-05 | 1976-02-04 | $7700.00 | Window Closed / Lapsed |