Patent US3176251A successfully refreshed from Google Patents.
US3176251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromechanical tuned filter
Assignee: Erie Resistor Corp
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Filing: 1960-01-26
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Granted: 1965-03-30
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Expires: 1980-01-26
Abstract
No abstract record available.
Inventors
- 👤 Daniel C Kuenzig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:53
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/46; H03H9/54; H03H9/545; H03H9/02; H03H9/05; H03H9/0504; H03H9/56; H03H9/562; H10; H10N; H10N30/00; H10N30/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN A TUNED ELECTRONIC CIRCUIT, A PIEZOELECTRIC COUPLING ELEMENT COMPRISING A DISC OF FERROELECTRIC CERAMIC MATERIAL POLARIZED IN THE THICKNESS DIRECTION AND HAVING ELECTRODES ON OPPOSITE SIDES EXCITING THE DISC IN THE RADIAL MODE OF VIBRATION, SAID DISC HAVING A CENTRAL HOLE WHICH IS ENLARGED TO TUNE THE DISC TO LOWER FREQUENCIES, AND A MOUNTING FOR THE DISC INCLUDING A PART ENGAGING ONE SIDE OF THE DISC AROUND THE HOLE AND A LEAD EXTENDING FROM SAID ONE SIDE OF THE DISC THROUGH SAID HOLE AND ENGAGING THE ELECTRODE ON THE OPPOSITE SIDE OF THE DISC AROUND SAID HOLE.
Claim 2
Dependent Claim
98 words
IN A TUNED ELECTRONIC CIRCUIT, A PIEZOELECTRIC COUPLING ELEMENT COMPRISING A DISC OF FERROELECTRIC CERAMIC MATERIAL POLARIZED IN THE THICKNESS DIRECTION AND HAVING ELECTRODES ON OPPOSITE SIDES EXCITING THE DISC IN THE RADIAL MODE OF VIBRATION, SAID DISC HAVING A CENTRAL HOLE WHICH IS ENLARGED TO TUNE THE DISC TO LOWER FREQUENCIES, AND A MOUNTING FOR THE DISC INCLUDING A PART ENGAGING ONE SIDE OF THE DISC AROUND THE HOLE AND A LEAD EXTENDING FROM SAID ONE SIDE OF THE DISC THROUGH SAID HOLE AND ENGAGING THE ELECTRODE ON THE OPPOSITE SIDE OF THE DISC AROUND SAID HOLE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |