Patent US3081376A successfully refreshed from Google Patents.
US3081376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Subscription television system
Assignee: Zenith Electronics LLC
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Filing: 1959-03-23
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Granted: 1963-03-12
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Expires: 1979-03-23
Abstract
No abstract record available.
Inventors
- 👤 Bernard D Loughlin
- 👤 Erwin M Roschke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:11
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/16; H04N7/167; H04N7/171; H04N7/1713
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
AN ENCODING ARRANGEMENT FOR A SUBSCRIPTION TELEVISION SYSTEM COMPRISING: MEANS FOR DERIVING A TELEVISION SIGNAL HAVING VIDEO INFORMATION IN RECURRING LINE-TRACE INTERVALS AND SYNCHRONIZING COMPONENTS IN RECURRING LINERETRACE INTERVALS; MEANS FOR DERIVING AN ENCODING SIGNAL COMPONENT OF APPROXIMATELY SINUSOIDAL WAVEFORM AND HAVING A FREQUENCY CORRESPONDING APPROXIMATELY TO LINE FREQUENCY; AND MEANS FOR INTRODUCING SAID ENCODING SIGNAL AT LEAST INTO SAID TRACE INTERVALS OF SAID TELEVISION SIGNAL IN PHASE OPPOSITION TO SAID SYNCHRONIZING COMPONENTS AND OF SUCH AMPLITUDE AS TO MODIFY THE EFFECTIVENESS OF SAID SYNCHRONIZING COMPONENTS.
Claim 2
Dependent Claim
86 words
AN ENCODING ARRANGEMENT FOR A SUBSCRIPTION TELEVISION SYSTEM COMPRISING: MEANS FOR DERIVING A TELEVISION SIGNAL HAVING VIDEO INFORMATION IN RECURRING LINE-TRACE INTERVALS AND SYNCHRONIZING COMPONENTS IN RECURRING LINERETRACE INTERVALS; MEANS FOR DERIVING AN ENCODING SIGNAL COMPONENT OF APPROXIMATELY SINUSOIDAL WAVEFORM AND HAVING A FREQUENCY CORRESPONDING APPROXIMATELY TO LINE FREQUENCY; AND MEANS FOR INTRODUCING SAID ENCODING SIGNAL AT LEAST INTO SAID TRACE INTERVALS OF SAID TELEVISION SIGNAL IN PHASE OPPOSITION TO SAID SYNCHRONIZING COMPONENTS AND OF SUCH AMPLITUDE AS TO MODIFY THE EFFECTIVENESS OF SAID SYNCHRONIZING COMPONENTS.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-11 | 1966-09-10 | 1967-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-11 | 1970-09-10 | 1971-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-11 | 1974-09-10 | 1975-03-12 | $7700.00 | Window Closed / Lapsed |