Patent US4062790A successfully refreshed from Google Patents.
US4062790A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric ceramic compositions
Assignee: Panasonic Holdings Corp
•
Filing: 1973-08-24
•
Granted: 1977-12-13
•
Expires: 1993-08-24
Abstract
Abstract Piezoelectric ceramic compositions having very high mechanical quality factors, high electromechanical coupling coefficients and high durabilities of the piezoelectric constants with cycling of mechanical impact, and comprising the quaternary system Pb(Zn1/3Nb2/3)O3-Pb(Mn1/3Nb2/3)O3-PbTiO3-PbZrO3.
Inventors
- 👤 Masamitsu Nishida
- 👤 Hiromu Ouchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:52
CPC Classifications
H; H10; H10N; H10N30/00; H10N30/80; H10N30/85; H10N30/853; C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/48; C04B35/49; C04B35/491; C04B35/493; C04B35/50; C04B35/51
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
20 words
A piezoelectric ceramic composition consisting essentially of a material represented by the formula: Pb(Zn.sub.1/3 Nb.sub.2/3).sub.0.06 (Mn.sub.1/3 Nb.sub.2/3).sub.0.06 Ti.sub.0.44 Zr.sub.0.44 O.sub.3.
Claim 2
Dependent Claim
20 words
A piezoelectric ceramic composition consisting essentially of a material represented by the formula: Pb(Zn.sub.1/3 Nb.sub.2/3).sub.0.06 (Mn.sub.1/3 Nb.sub.2/3).sub.0.06 Ti.sub.0.44 Zr.sub.0.44 O.sub.3.
Claim 3
Dependent Claim
13 words
An electromechanical transducer element comprising a ceramic composition as claimed in claim 1.
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) | 1980-12-12 | 1981-06-13 | 1981-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-12 | 1985-06-13 | 1985-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-12 | 1989-06-13 | 1989-12-13 | $7700.00 | Window Closed / Lapsed |