US3781577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric resonator
Assignee: NEC Corp
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Filing: 1971-08-25
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Granted: 1973-12-25
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Expires: 1991-08-25
Abstract
Abstract A piezoelectric resonator including a thickness shear piezoelectric element having an electrode on each face thereof, one electrode formed with two apertures spaced in the region of largest expansion and contraction on the geometrical axis in the shearing direction of the element where amplitude vibration is a maximum.
Inventors
- 👤 K Hara
- 👤 S Nonaka
- 👤 T Yuuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:54
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/125; H03H9/13; H03H9/132
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A piezoelectric resonator including a thickness shear piezoelectric element having an electrode on each face thereof, one electrode formed with apertures in the region of largest expansion and contraction on the geometrical axis in the shearing direction of said element where amplitude vibration is a maximum.
Claim 2
Dependent Claim
46 words
A piezoelectric resonator including a thickness shear piezoelectric element having an electrode on each face thereof, one electrode formed with apertures in the region of largest expansion and contraction on the geometrical axis in the shearing direction of said element where amplitude vibration is a maximum.
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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |