US3671765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromechanical resonator employing piezoelectric ceramic consisting of lead zirconate-titanate containing manganese monoxide
Assignee: US Philips Corp
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Filing: 1970-09-25
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Granted: 1972-06-20
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Expires: 1990-09-25
Abstract
Abstract An electromechanical resonator having a ceramic piezoelectric member consisting of MnO-containing lead zirconate-titanate of the composition Pb(ZrxTi1 x)03 + y % by weight of MnO, where x 0.52 - 0.58 and y 0.22 - 0.40.
Inventors
- 👤 Karl Heinz Hardtl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:27
CPC Classifications
H; H03; H03H; H03H3/00; H03H3/007; H03H3/02; C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/48; C04B35/50; C04B35/51; H10; H10N; H10N30/00; H10N30/80; H10N30/85; H10N30/853; H10N30/8548; H10N30/8554
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
47 words
An electromechanical resonator and in particular an electromechanical filter as claimed in claim 1, in which the composition of the ceramic piezoelectric member is represented by the formula Pb(ZrxTi1 x)O3 + y % by weight of MnO, where x 0.53 - 0.56 and y 0.22 - 0.40.
Claim 2
Dependent Claim
47 words
An electromechanical resonator and in particular an electromechanical filter as claimed in claim 1 in which the composition of the ceramic piezoelectric member is represented by the formula Pb(ZrxTi1 x)O3 + y % by weight of MnO, where x 0.52 - 0.58 and y 0.25 - 0.35.
Claim 3
Dependent Claim
47 words
An electromechanical resonator and in particular an electromechanical filter as claimed in claim 1 in which the composition of the ceramic piezoelectric member is represented by the formula Pb(ZrxTi1 x)O3 + y % by weight of MnO, where x 0.52 - 0.58 and y 0.30 - 0.35.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |