Patent US3287645A successfully refreshed from Google Patents.
US3287645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weak signal booster
Assignee: Individual
•
Filing: 1963-01-28
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Granted: 1966-11-22
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Expires: 1983-01-28
Abstract
No abstract record available.
Inventors
- 👤 Elie J Baghdady
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:23
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/10; H04B1/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
130 words
A CIRCUIT FOR ENHANCING THE WEAKER OF TWO CO-CHANNEL SIGNALS COMPRISING, MEANS TO EXTRACT THE BEAT OR DIFFERENCE FREQUENCY BETWEEN SAID CO-CHANNEL SIGNALS, MEANS TO MULTIPLY SAID DIFFERENCE FREQUENCY AND SAID TWO COCHANNEL SIGNALS IN A FIRST BALANCED MODULATOR, MEANS TO SQUARE SAID TWO CO-CHANNEL SIGNALS AND MEANS TO MULTIPLY SAID SQUARED SIGNAL AND SAID TWO CO-CHANNEL SIGNALS IN A SECOND BALANCED MODULATOR, MEANS TO SELECT THE COMPONENTS IN THE OUTPUT OF SAID SECOND BALANCED MODULATOR AT THE FREQUENCY OF THE TWO ORIGINAL CO-CHANNEL SIGNALS, AND ALSO THOSE COMPONENTS ABOVE AND BELOW THE FREQUENCIES OF SAID TWO SIGNAL CO-CHANNEL SIGNALS BY THE AMOUNT OF SAID DIFFERENCE FREQUENCY, AND MEANS TO ADD THE OUTPUTS OF SAID FIRST BALANCED MODULATOR AND THE SELECTED COMPONENTS IN THE OUTPUT OF SAID SECOND BALANCED MODULATOR.
References Cited (Backward Citations)
US3092776A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |