US3226484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time division telephone signaling
Assignee: AT&T Inc
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Filing: 1961-11-17
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Granted: 1965-12-28
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Expires: 1981-11-17
Abstract
No abstract record available.
Inventors
- 👤 Dennis B James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:32
CPC Classifications
H; H04; H04Q; H04Q11/00; H04Q11/04; H04N; H04N7/00; H04N7/14; H04N7/141
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
TIME DIVISION SIGNALING APPARTUS WHICH COMPRISES: A TIME DIVISION SWITCHING NETWORK HVING A FIRST PLURALITY OF TERMINALS, SOME OF WHICH ARE CONNECTED TO SOURCES OF A FIRST KIND TO WHICH ARE ASSIGNABLE INDIVIDUAL AND RECURRENT TIME SLOT INTEVALS; AN AUXILIARY SWITCHING NETWORK HVING A CONTROL POINT AND A SECOND PLURALITY OF TERMINALS CONNECTED TO SOURCES OF A SECOND KIND, DISTINCTIVE FROM THE FIRST; A SIGNALING PATH INTERCONNECTING THE CONTROL POINT OF SAID AUXILIARY NETWORK WITH ONE TERMINAL OF SAID TIME DIVISION NETWORK; MEANS FOR ACTIVATING SAID SIGNALING PATH DRIVING A PRESSIGNED
Claim 2
Dependent Claim
91 words
TIME DIVISION SIGNALING APPARTUS WHICH COMPRISES: A TIME DIVISION SWITCHING NETWORK HVING A FIRST PLURALITY OF TERMINALS, SOME OF WHICH ARE CONNECTED TO SOURCES OF A FIRST KIND TO WHICH ARE ASSIGNABLE INDIVIDUAL AND RECURRENT TIME SLOT INTEVALS; AN AUXILIARY SWITCHING NETWORK HVING A CONTROL POINT AND A SECOND PLURALITY OF TERMINALS CONNECTED TO SOURCES OF A SECOND KIND, DISTINCTIVE FROM THE FIRST; A SIGNALING PATH INTERCONNECTING THE CONTROL POINT OF SAID AUXILIARY NETWORK WITH ONE TERMINAL OF SAID TIME DIVISION NETWORK; MEANS FOR ACTIVATING SAID SIGNALING PATH DRIVING A PRESSIGNED
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) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |