Patent US3890241A successfully refreshed from Google Patents.
US3890241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric ceramic compositions
Assignee: Panasonic Holdings Corp
•
Filing: 1973-09-05
•
Granted: 1975-06-17
•
Expires: 1993-09-05
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(Sn1/3Nb2/3)O3-PbTiO3-PbZrO3 and containing a quantity of manganese equivalent to from 0.05 to 5 weight % of MnO2.
Inventors
- 👤 Masamitsu Nishida
- 👤 Hiromu Ouchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:35
CPC Classifications
H; H10; H10N; H10N30/00; H10N30/80; H10N30/85; H10N30/853; C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/48; C04B35/50; C04B35/51
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
15 words
A PIEZOELECTRIC CERAMIC COMPOSITION CONSISTING ESSENTIALLY OF A MATERIAL REPRESENTED BY THE FORMULA: SP@ PB(ZN1/3NB2/3)A(SN1/3NB2/3)BTICZRDP03
Claim 2
Dependent Claim
15 words
A PIEZOELECTRIC CERAMIC COMPOSITION CONSISTING ESSENTIALLY OF A MATERIAL REPRESENTED BY THE FORMULA: SP@ PB(ZN1/3NB2/3)A(SN1/3NB2/3)BTICZRDP03
Claim 3
Dependent Claim
13 words
An electromechanical transducer element comprising a ceramic composition as claimed in claim 1.
Claim 4
Dependent Claim
30 words
A piezoelectric ceramic composition consisting essentially of a material represented by the formula: Pb(Zn1/3Nb2/3)0.06(Sn1/3Nb2/3)0.06Ti0.43Zr0.45O3, and further containing a quantity of manganese equivalent to 0.5 weight percent of manganese dioxide (MnO2).
Claim 5
Dependent Claim
30 words
A piezoelectric ceramic composition consisting essentially of a material represented by the formula: Pb(Zn1/3Nb2/3)0.06(Sn1/3Nb2/3)0.06Ti0.43Zr0.45O3, and further containing a quantity of manganese equivalent to 0.5 weight percent of manganese dioxide (MnO2).
Claim 6
Dependent Claim
14 words
An electromechanical transducer element comprising a piezoelectric ceramic composition as claimed in claim 3.
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) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |