Patent US3202990A successfully refreshed from Google Patents.
US3202990A
Expired / Lapsed
US
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Intermediate frequency side-lobe canceller
Assignee: General Electric Co
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Filing: 1959-05-04
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Granted: 1965-08-24
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Expires: 1979-05-04
Abstract
No abstract record available.
Inventors
- 👤 Paul W Howells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:51
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/28; G01S7/2813; H; H01; H01Q; H01Q3/00; H01Q3/26; H01Q3/2605; H01Q3/2611; H01Q3/2629; H04; H04B; H04B1/00; H04B1/06; H04B1/10; H04B1/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
IN A NOISE CANCELLER, A MAIN SIGNAL TRANSMISSION CHANNEL HAVING AN OUTPUT TERMINAL, AN AUXILIARY SIGNAL TRANSMISSION CHANNEL HAVING AN OUTPUT TERMINAL, SAID CHANNELS HAVING CROSS COUPLING THEREBETWEEN, MEANS FOR DETECTING THE RELATIVE AMPLITUDE AND PHASE OF EACH OF THE CROSS COUPLED SIGNALS, A COMPENSATING CROSS FEED NETWORK CAPABLE OF ADJUSTMENT FOR MINIMIZING CROSS COUPLING AT AT LEAST ONE OUTPUT TERMINAL, MEANS RESPONSIVE TO SAID RELATIVE AMPLITUDE AND PHASE FOR AUTOMATICALLY ADJUSTING SAID CROSS FEED NETWORK IN ORDER TO MINIMIZE CROSS COUPLING.
Claim 2
Dependent Claim
82 words
IN A NOISE CANCELLER, A MAIN SIGNAL TRANSMISSION CHANNEL HAVING AN OUTPUT TERMINAL, AN AUXILIARY SIGNAL TRANSMISSION CHANNEL HAVING AN OUTPUT TERMINAL, SAID CHANNELS HAVING CROSS COUPLING THEREBETWEEN, MEANS FOR DETECTING THE RELATIVE AMPLITUDE AND PHASE OF EACH OF THE CROSS COUPLED SIGNALS, A COMPENSATING CROSS FEED NETWORK CAPABLE OF ADJUSTMENT FOR MINIMIZING CROSS COUPLING AT AT LEAST ONE OUTPUT TERMINAL, MEANS RESPONSIVE TO SAID RELATIVE AMPLITUDE AND PHASE FOR AUTOMATICALLY ADJUSTING SAID CROSS FEED NETWORK IN ORDER TO MINIMIZE CROSS COUPLING.
References Cited (Backward Citations)
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US2268998A
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US2825900A
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |