Patent US3187091A successfully refreshed from Google Patents.
US3187091A
Expired / Lapsed
US
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Subscription-television audioreceiving system
Assignee: Paramount Pictures Corp
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Filing: 1961-06-13
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Granted: 1965-06-01
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Expires: 1981-06-13
Abstract
No abstract record available.
Inventors
- 👤 Quan Wasson
- 👤 Jr Richard C Cardin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:26
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/16; H04N7/162; H04N7/163; H04N7/164
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
111 words
A SUBSSCRIPTION-TELEVISION SYSTEM COMPRISING A TRANSMITTER HAVING MEANS FOR GENERATING AUDIO SIGNALS, MEANS FOR GENERATING A CARRIER HAVING A FREQUENCY OF 4.5 MC./S., MEANS FOR FREQUENCY MODULATING SAID AUDIO SIGNALS ON SAID CARRIER, A RECEIVER HAVING AN INTERCARRIER SOUND-DEMODULATING SYSTEM, MEANS FOR TRANSMITTING SAID FREQUENCYMODULATED CARRIER TO SAID RECEIVER, MEANS AT SAID RECEIVER FOR GENERATING A LOCAL UNMODULATED CARRIED HAVING A FREQUENCY WHICH WHEN COMBINED WITH A FREQUENCY-MODULATED CARRIER HAVING A FREQUENCY WHICH IS 4.5 MC./S. DIFFERENT, CAN BE PROCESSED BY SAID RECEIVER INTERCARRIER SOUND SYSTEM, MEANS FOR MIXING SAID FREQUENCY-MODULATED CARRIER AND SAID LOCAL CARRIER, AND MEANS FOR APPLYING SAID MEANS FOR MIXING OUTPUT TO SAID RECEIVER INTERCARRIER SOUND-DEMODULATING SYSTEM.
References Cited (Backward Citations)
US2875274A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-05-31 | 1968-11-30 | 1969-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-31 | 1972-11-30 | 1973-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-31 | 1976-11-30 | 1977-06-01 | $7700.00 | Window Closed / Lapsed |