US3219760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mono-stereo control apparatus for fm multiplex stereo signal receiver system
Assignee: Hazeltine Research Inc
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Filing: 1962-02-26
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Granted: 1965-11-23
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Expires: 1982-02-26
Abstract
No abstract record available.
Inventors
- 👤 Bernard D Loughlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:49
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/1646; H04B1/1653
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
FOR USE IN A BROADCAST STEREO SIGNAL RECEIVER SYSTEM, APPARATUS FOR CONTROLLING THE OPERATION OF A CARRIERINJECTING OSCILLATOR INCLUDED IN THE STERO CIRCUITS THEREOF COMPRISING: MEANS FOR DERIVING A SIGNAL REPRESENTATIVE OF THE PRESENCE OF ABSENCE OF STEREO SIGNALS IN A RECEIVED BROADCAST SIGNAL; MEANS RESPONSIVE TO SAID SIGNAL FOR DERIVING THEREFROM A VARIABLE LOADING EFFECT CAPABLE OF DAMPING OUT OSCILLATIONS IN THE RESONANT CIRCUIT OF SAID OSCILLATOR IN THE ABSENCE OF A RECEIVED STEREO SIGNAL AND FOR OTHERWISE ENABLING SAID OSCILLATIONS; AND MEANS FOR APPLYING SAID CONTROL EFFECT TO SAID RESONANT CIRCUIT.
Claim 2
Dependent Claim
93 words
FOR USE IN A BROADCAST STEREO SIGNAL RECEIVER SYSTEM, APPARATUS FOR CONTROLLING THE OPERATION OF A CARRIERINJECTING OSCILLATOR INCLUDED IN THE STERO CIRCUITS THEREOF COMPRISING: MEANS FOR DERIVING A SIGNAL REPRESENTATIVE OF THE PRESENCE OF ABSENCE OF STEREO SIGNALS IN A RECEIVED BROADCAST SIGNAL; MEANS RESPONSIVE TO SAID SIGNAL FOR DERIVING THEREFROM A VARIABLE LOADING EFFECT CAPABLE OF DAMPING OUT OSCILLATIONS IN THE RESONANT CIRCUIT OF SAID OSCILLATOR IN THE ABSENCE OF A RECEIVED STEREO SIGNAL AND FOR OTHERWISE ENABLING SAID OSCILLATIONS; AND MEANS FOR APPLYING SAID CONTROL EFFECT TO SAID RESONANT CIRCUIT.
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) | 1968-11-22 | 1969-05-24 | 1969-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-22 | 1973-05-24 | 1973-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-22 | 1977-05-24 | 1977-11-23 | $7700.00 | Window Closed / Lapsed |