US3353147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Close-in target electronic cancellation device
Assignee: Individual
•
Filing: 1966-03-18
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Granted: 1967-11-14
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Expires: 1986-03-18
Abstract
No abstract record available.
Inventors
- 👤 Jr George W Meeker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:24
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/32; G01S13/36; G01S15/00; G01S15/02; G01S15/06; G01S15/08; G01S15/32; G01S15/34; Y; Y10; Y10S; Y10S367/00; Y10S367/901
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
AN ELECTRONIC NOTCH FILTER HAVING A VARIABLE CENTER FREQUENCY, COMPRISING: AN ADDER CIRCUIT RECEIVING AS ONE INPUT THE SIGNAL TO BE FILTERED AND PROVIDING A FILTERED OUTPUT SIGNAL, AND AN ELECTRONIC BAND PASS FILTER THE CENTER FREQUENCY OF WHICH VARIES IN STEP WITH A MASTER FREQUENCY, THE OUTPUT OF SAID ADDER CIRCUIT BEING CONNECTED TO THE INPUT OF SAID ELECTRONIC BAND PASS FILTER AND THE OUTPUT OF SAID ELECTRONIC BAND PASS FILTER BEING CONNECTED TO A SECOND INPUT OF SAID ADDER CIRCUIT.
Claim 2
Dependent Claim
82 words
AN ELECTRONIC NOTCH FILTER HAVING A VARIABLE CENTER FREQUENCY, COMPRISING: AN ADDER CIRCUIT RECEIVING AS ONE INPUT THE SIGNAL TO BE FILTERED AND PROVIDING A FILTERED OUTPUT SIGNAL, AND AN ELECTRONIC BAND PASS FILTER THE CENTER FREQUENCY OF WHICH VARIES IN STEP WITH A MASTER FREQUENCY, THE OUTPUT OF SAID ADDER CIRCUIT BEING CONNECTED TO THE INPUT OF SAID ELECTRONIC BAND PASS FILTER AND THE OUTPUT OF SAID ELECTRONIC BAND PASS FILTER BEING CONNECTED TO A SECOND INPUT OF SAID ADDER 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) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |