US3411098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable q notched filter
Assignee: NEOTEC Corp A CORP OF DE
•
Filing: 1965-10-22
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Granted: 1968-11-12
•
Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Frank M Perra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:21
CPC Classifications
H; H03; H03H; H03H11/00; H03H11/02; H03H11/04; H03H11/12; H03H11/1295
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A VARIABLE Q NOTCH FILTER COMPRISING A PARALLEL-T FILTER SECTION WHICH PASSES ALL BUT A PREDETERMINED FREQUENCY SIGNAL AND HAVING AN INPUT ARM, AN OUTPUT ARM, AND AN INTERMEDIATE ARM, AN INPUT CIRCUIT CONNECTED TO SAID INPUT ARM, MEANS COUPLED TO SAID OUTPUT ARM FOR DEVELOPING A SIGNAL IN PHASE WITH THE SIGNAL ON SAID OUTPUT
Claim 2
Dependent Claim
56 words
A VARIABLE Q NOTCH FILTER COMPRISING A PARALLEL-T FILTER SECTION WHICH PASSES ALL BUT A PREDETERMINED FREQUENCY SIGNAL AND HAVING AN INPUT ARM, AN OUTPUT ARM, AND AN INTERMEDIATE ARM, AN INPUT CIRCUIT CONNECTED TO SAID INPUT ARM, MEANS COUPLED TO SAID OUTPUT ARM FOR DEVELOPING A SIGNAL IN PHASE WITH THE SIGNAL ON SAID OUTPUT
References Cited (Backward Citations)
US3271693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-12 | 1972-05-13 | 1972-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-12 | 1976-05-13 | 1976-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-12 | 1980-05-13 | 1980-11-12 | $7700.00 | Window Closed / Lapsed |