US3355668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tunable notch filter
Assignee: Bendix Corp
•
Filing: 1963-09-30
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Granted: 1967-11-28
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Expires: 1983-09-30
Abstract
No abstract record available.
Inventors
- 👤 Donald W Boensel
- 👤 Arnold C Knudsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:04
CPC Classifications
H; H03; H03H; H03H11/00; H03H11/02; H03H11/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A TUNABLE NOTCH FILTER COMPRISING MEANS FOR RECEIVING INPUT SIGNALS HAVING AN UNWANTED COMPONENT, SIGNAL GENERATING MEANS AND A MULTIPLIER CONNECTED IN A PHASELOCKED LOOP AND COUPLED TO RECEIVE SAID UNWANTED COMPONENT FOR PHASE COMPARISON, AND MEANS FOR COMBINING A SIGNAL GENERATED BY THE SIGNAL GENERATING MEANS WITH THE RECEIVED INPUT SIGNAL IN ORDER TO EFFECT TO A CANCELLATION OF THE UNWANTED COMPONENT THEREOF.
Claim 2
Dependent Claim
64 words
A TUNABLE NOTCH FILTER COMPRISING MEANS FOR RECEIVING INPUT SIGNALS HAVING AN UNWANTED COMPONENT, SIGNAL GENERATING MEANS AND A MULTIPLIER CONNECTED IN A PHASELOCKED LOOP AND COUPLED TO RECEIVE SAID UNWANTED COMPONENT FOR PHASE COMPARISON, AND MEANS FOR COMBINING A SIGNAL GENERATED BY THE SIGNAL GENERATING MEANS WITH THE RECEIVED INPUT SIGNAL IN ORDER TO EFFECT TO A CANCELLATION OF THE UNWANTED COMPONENT THEREOF.
References Cited (Backward Citations)
US3241077A
Cited
US3204047A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-27 | 1971-05-29 | 1971-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-27 | 1975-05-29 | 1975-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-27 | 1979-05-29 | 1979-11-28 | $7700.00 | Window Closed / Lapsed |