US3562764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Annular type ceramic filter device
Assignee: Murata Manufacturing Co Ltd
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Filing: 1968-10-25
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Granted: 1971-02-09
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Expires: 1988-10-25
Abstract
Abstract AN ANNULAR TYPE CERAMIC FILTER DEVICE. AN ANNULAR PIEZOELECTRIC CERAMIC RESONATOR VIBRATING IN THE CIRCULAR VIBRATION MODE HAS TWO TERMINAL ELECTRODES ON OPPOSITE CIRCUITS. A LOWER HOUSING HAS A SUPPORTING MEMBER THEREIN SUPPORTING THE RESONATOR AT THE CENTRAL APERTURE THEREOF. INNER LEAD WIRES EXTEND FROM THE ELECTRODES TO THE LOWER HOUSING AND THEN TO EXTERNAL LEAD WIRES EXTENDING FROM THE OUTSIDE OF THE WALL OF THE HOUSING. AN UPPER HOUSING COVERS THE LOWER HOUSING.
Inventors
- 👤 Satoru Fujishima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:07
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/05; H03H9/09
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |