US3261918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synchronization of pulse communication systems
Assignee: AT&T Inc
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Filing: 1961-11-21
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Granted: 1966-07-19
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Expires: 1981-11-21
Abstract
No abstract record available.
Inventors
- 👤 Leo J Sisti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:26
CPC Classifications
H; H04; H04J; H04J3/00; H04J3/02; H04J3/06; H04J3/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
IN A BINARY PULSE COMMUNICATION SYSTEM IN WHICH SUCCESSIVE FRAMES OF A PREDETERMINED NUMBER OF REGULARLY RECURRING MESSAGE DIGITS EACH ARE TRANSMITTED IN SEQUENCE FROM A TRANSMITTING TERMINAL TO A RECEIVING TERMINAL, IN WHICH A FRAMING DIGIT IS TRANSMITTED ONCE EACH FRAME IN SEQUENCE WITH SAID MESSAGE DIGITS, AND IN WHICH SAID FRAMING DIGIT IS ALTERNATELY A PULSE AND A SPACE IN SUCCESSIVE FRAMES, APPARATUS AT SAID RECEIVING TERMINAL WHICH COMPRISES A TIMING CIRCUIT FOR GENERATING AN INTERNAL FRAMING DIGIT HAVING THE REPETITION FREQUENCY AND ALTERNATE PULSE-SPACE PATTERN OF SAID TRANSMITTED FRAMING DIGIT, A NORMALLY ENABLED ALARMED CIRCUIT, A TWO-INPUT AND GATE HAVING ONE INPUT CONNECTED TO RECEIVE SAID TRANSMITTED MESSAGE DIGITS AND FRAMING DIGIT AND THE OTHER CONNECTED TO RECEIVE SAID INTERNAL FRAMING DIGIT, AND MEANS TO DIS-
Claim 2
Dependent Claim
129 words
IN A BINARY PULSE COMMUNICATION SYSTEM IN WHICH SUCCESSIVE FRAMES OF A PREDETERMINED NUMBER OF REGULARLY RECURRING MESSAGE DIGITS EACH ARE TRANSMITTED IN SEQUENCE FROM A TRANSMITTING TERMINAL TO A RECEIVING TERMINAL, IN WHICH A FRAMING DIGIT IS TRANSMITTED ONCE EACH FRAME IN SEQUENCE WITH SAID MESSAGE DIGITS, AND IN WHICH SAID FRAMING DIGIT IS ALTERNATELY A PULSE AND A SPACE IN SUCCESSIVE FRAMES, APPARATUS AT SAID RECEIVING TERMINAL WHICH COMPRISES A TIMING CIRCUIT FOR GENERATING AN INTERNAL FRAMING DIGIT HAVING THE REPETITION FREQUENCY AND ALTERNATE PULSE-SPACE PATTERN OF SAID TRANSMITTED FRAMING DIGIT, A NORMALLY ENABLED ALARMED CIRCUIT, A TWO-INPUT AND GATE HAVING ONE INPUT CONNECTED TO RECEIVE SAID TRANSMITTED MESSAGE DIGITS AND FRAMING DIGIT AND THE OTHER CONNECTED TO RECEIVE SAID INTERNAL FRAMING DIGIT, AND MEANS TO DIS-
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) | 1969-07-18 | 1970-01-17 | 1970-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-18 | 1974-01-17 | 1974-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-18 | 1978-01-17 | 1978-07-19 | $7700.00 | Window Closed / Lapsed |