US3436479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Check circuit for comparing the input and output of data repeaters
Assignee: AT&T Inc
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Filing: 1966-04-11
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Granted: 1969-04-01
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Expires: 1986-04-11
Abstract
No abstract record available.
Inventors
- 👤 George P Houcke
- 👤 Louis Prats
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:45
CPC Classifications
H; H04; H04L; H04L1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
IN A CIRCUIT FOR COMPARING THE CORRESPONDENCE OF A FIRST NON-RETURN TO ZERO BINARY DATA ELEMENT TRAIN WITH A TRAIN HAVING A RELATIVE DELAY OF LESS THAN AN ELEMENT DURATION, ERROR INDICATING MEANS, A DELAY CIRCUIT HAVING A DELAY INTERVAL EXCEEDING AN ELEMENT INTERVAL, MEANS RESPONSIVE TO EACH TRANSITION IN SAID FIRST TRAIN BETWEEN ELEMENTS HAVING ALTERNATE ONES OF THE BINARY CONDITIONS FOR RESETTING SAID DELAY CIRCUIT, MEANS RESPONSIVE TO THE TIME OUT OF SAID DELAY CIRCUIT AT THE END OF SAID DELAY INTERVAL FOR OPERATING SAID ERROR INDICATING MEANS, AND COMPARISON MEANS JOINTLY RESPONSIVE TO THE CONDITIONS OF CONCURRENT ELEMENTS IN SAID FIRST TRAIN AND SAID DELAYED TRAIN FOR CONTROLLING SAID OPERATING MEANS.
Claim 2
Dependent Claim
114 words
IN A CIRCUIT FOR COMPARING THE CORRESPONDENCE OF A FIRST NON-RETURN TO ZERO BINARY DATA ELEMENT TRAIN WITH A TRAIN HAVING A RELATIVE DELAY OF LESS THAN AN ELEMENT DURATION, ERROR INDICATING MEANS, A DELAY CIRCUIT HAVING A DELAY INTERVAL EXCEEDING AN ELEMENT INTERVAL, MEANS RESPONSIVE TO EACH TRANSITION IN SAID FIRST TRAIN BETWEEN ELEMENTS HAVING ALTERNATE ONES OF THE BINARY CONDITIONS FOR RESETTING SAID DELAY CIRCUIT, MEANS RESPONSIVE TO THE TIME OUT OF SAID DELAY CIRCUIT AT THE END OF SAID DELAY INTERVAL FOR OPERATING SAID ERROR INDICATING MEANS, AND COMPARISON MEANS JOINTLY RESPONSIVE TO THE CONDITIONS OF CONCURRENT ELEMENTS IN SAID FIRST TRAIN AND SAID DELAYED TRAIN FOR CONTROLLING SAID OPERATING MEANS.
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) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |