US3391341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Receiving system for suppressed carrier waves
Assignee: AT&T Inc
•
Filing: 1965-09-23
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Granted: 1968-07-02
•
Expires: 1985-09-23
Abstract
No abstract record available.
Inventors
- 👤 Thomas W Eddy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:57
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/30; H04B1/302
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A SIGNAL RECEIVING SYSTEM COMPRISING, IN COMBINATION, MEANS RESPONSIVE TO THE SIDEBAND INFORMATION OF APPLIED AMPLITUDE MODULATED, SUPPRESSED CARRIER SIGNALS FOR DEVELOPING A CARRIER REINSERTION SIGNAL OF A FREQUENCY CORRESPONDING TO THAT OF SAID SUPPRESSED CARRIER, MEANS RESPONSIVE TO SAID MODULATED SIGNALS AND SAID CARRIER REINSERTION SIGNAL FOR DEVELOPING A CONTROL CORRESPONDING TO THE MODULATING INFORMATION, MEANS RESPONSIVE TO SAID MODULATED SIGNALS AND SAID CARRIER REINSERTION SIGNAL FOR DEVELOPING A CONTROL SIGNAL INDICATIVE OF THE PHASE RELATIONSHIP OF SAID SUPPRESSED CARRIER AND SAID CARRIER REINSERTION SIGNALS, AND MEANS RESPONSIVE TO SAID CONTROL SIGNAL FOR SELECTIVELY ALTERING THE PHASE OF SAID CARRIER REINSERTION SIGNAL.
Claim 2
Dependent Claim
103 words
A SIGNAL RECEIVING SYSTEM COMPRISING, IN COMBINATION, MEANS RESPONSIVE TO THE SIDEBAND INFORMATION OF APPLIED AMPLITUDE MODULATED, SUPPRESSED CARRIER SIGNALS FOR DEVELOPING A CARRIER REINSERTION SIGNAL OF A FREQUENCY CORRESPONDING TO THAT OF SAID SUPPRESSED CARRIER, MEANS RESPONSIVE TO SAID MODULATED SIGNALS AND SAID CARRIER REINSERTION SIGNAL FOR DEVELOPING A CONTROL CORRESPONDING TO THE MODULATING INFORMATION, MEANS RESPONSIVE TO SAID MODULATED SIGNALS AND SAID CARRIER REINSERTION SIGNAL FOR DEVELOPING A CONTROL SIGNAL INDICATIVE OF THE PHASE RELATIONSHIP OF SAID SUPPRESSED CARRIER AND SAID CARRIER REINSERTION SIGNALS, AND MEANS RESPONSIVE TO SAID CONTROL SIGNAL FOR SELECTIVELY ALTERING THE PHASE OF SAID CARRIER REINSERTION SIGNAL.
References Cited (Backward Citations)
US2784311A
Cited
US2924706A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-02 | 1972-01-01 | 1972-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-02 | 1976-01-01 | 1976-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-02 | 1980-01-01 | 1980-07-02 | $7700.00 | Window Closed / Lapsed |