Patent US3134855A successfully refreshed from Google Patents.
US3134855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse communication system
Assignee: AT&T Inc
•
Filing: 1960-10-07
•
Granted: 1964-05-26
•
Expires: 1980-10-07
Abstract
No abstract record available.
Inventors
- 👤 Norman E Chasek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:12
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/68; H04B14/00; H04B14/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
87 words
IN A PULSE COMMUNICATION SYSTEM, MEANS FOR QUADRATURE MULTIPLEXING PLURAL PULSE TRAINS ON A SUPPRESSED CARRIER, MEANS FOR INTRODUCING REFERENCE SIGNALS INTO EACH SAID PULSE TRAIN AT A PREDETERMINED FREQUENCY PRIOR TO SAID MULTIPLEXING, DEMODULATING MEANS FOR INDIVIDUALLY EXTRACTING SAID PULSE TRAINS FROM SAID SUPPRESSED CARRIER, CARRIER RESUPPLY MEANS FOR ENABLING SAID DEMODULATING MEANS, MEANS FOR SAMPLING SAID EXTRACTED PULSE TRAINS AT SAID PREDETERMINED FREQUENCY, AND MEANS CONTROLLED BY THE DIFFERENCE BETWEEN THE SAMPLES FROM EACH PULSE TRAIN FOR CONTROLLING THE PHASE OF SAID CARRIER RESUPPLY 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) | 1967-05-26 | 1967-11-25 | 1968-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-26 | 1971-11-25 | 1972-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-26 | 1975-11-25 | 1976-05-26 | $7700.00 | Window Closed / Lapsed |