Patent US3238457A successfully refreshed from Google Patents.
US3238457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal to noise ratio monitor
Assignee: Melpar Inc
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Filing: 1963-05-08
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Granted: 1966-03-01
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Expires: 1983-05-08
Abstract
No abstract record available.
Inventors
- 👤 Bernard R Boymel
- 👤 Jr Morris G Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:07
CPC Classifications
G; G01; G01R; G01R29/00; G01R29/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
APPARATUS FOR MONITORING THE TRANSMISSION QUALITY OF A SIGNAL CHANNEL CARRYING AUDIO SIGNAL IN THE PRESENCE OF NOISE, SAID APPARATUS COMPRISING MEANS RESPONSIVE TO SAID SIGNAL FOR DERIVING THEREFROM A WAVE REPRESENTATIVE OF THE ENVELOPE OF SAID SIGNAL, MEANS RESPONSIVE TO SAID WAVE FOR DETECTING THE PEAK AMPLITUDE THEREOF AND FOR GENERATING A VOLTAGE HAVING A LEVEL REPRESENTATIVE OF SAID PEAK AMPLITUDE, SAID PEAK AMPLITUDE BEING PROPORTIONAL TO MAXIMUM SIGNAL-PLUS-NOISE LEVEL ON SAID CHANNEL, FURTHER MEANS RESPONSIVE TO SAID WAVE FOR PHASE INVERSION THEREOF, MEANS RESPONSIVE TO THE INVERTED WAVE FOR DETECTING THE PEAK AMPLITUDE THEREOF AND FOR GENERATING A VOLTAGE HAVING A LEVEL REPRESENTATIVE OF THE LAST NAMED PEAK AMPLITUDE, SAID LAST NAMED PEAK AMPLITUDE BEING
Claim 2
Dependent Claim
117 words
APPARATUS FOR MONITORING THE TRANSMISSION QUALITY OF A SIGNAL CHANNEL CARRYING AUDIO SIGNAL IN THE PRESENCE OF NOISE, SAID APPARATUS COMPRISING MEANS RESPONSIVE TO SAID SIGNAL FOR DERIVING THEREFROM A WAVE REPRESENTATIVE OF THE ENVELOPE OF SAID SIGNAL, MEANS RESPONSIVE TO SAID WAVE FOR DETECTING THE PEAK AMPLITUDE THEREOF AND FOR GENERATING A VOLTAGE HAVING A LEVEL REPRESENTATIVE OF SAID PEAK AMPLITUDE, SAID PEAK AMPLITUDE BEING PROPORTIONAL TO MAXIMUM SIGNAL-PLUS-NOISE LEVEL ON SAID CHANNEL, FURTHER MEANS RESPONSIVE TO SAID WAVE FOR PHASE INVERSION THEREOF, MEANS RESPONSIVE TO THE INVERTED WAVE FOR DETECTING THE PEAK AMPLITUDE THEREOF AND FOR GENERATING A VOLTAGE HAVING A LEVEL REPRESENTATIVE OF THE LAST NAMED PEAK AMPLITUDE, SAID LAST NAMED PEAK AMPLITUDE BEING
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) | 1969-02-28 | 1969-08-30 | 1970-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-28 | 1973-08-30 | 1974-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-28 | 1977-08-30 | 1978-03-01 | $7700.00 | Window Closed / Lapsed |