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US4775649A
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Dielectric porcelain composition
Assignee: Ube Corp
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Filing: 1986-07-22
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Granted: 1988-10-04
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Expires: 2006-07-22
Abstract
Abstract A dielectric resonator to be advantageously used in 0.5-6 GHz band and having a large unloaded Q value, and adequate relative dielectric constant, a good stability of tau f and a superior linearity of temperature characteristic of the resonance frequency, may be constituted by the dielectric porcelain composition expressed by the formula: BaxSryCaz(Zn1/3Nb2/3)1-t TitO3 in which x+y+z=1, x is within the range of 0 to 0.5, y is within the range of 0.5 to 0.999, z is within the range of 0.001 to 0.20 and t is within the range of 0.001 to 0.25.
Inventors
- 👤 Ryozo Kitoh
- 👤 Mikio Hitaka
- 👤 Tetsuya Fujimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:23
CPC Classifications
H; H01; H01P; H01P7/00; H01P7/10; C; C04; C04B; C04B35/00; C04B35/01; C04B35/495
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
55 words
A dielectric porcelain composition expressed by the formula: Ba.sub.x Sr.sub.y Ca.sub.z (Zn.sub.1/3 Nb.sub.2/3).sub.1-t Ti.sub.t O.sub.3 in which x+y+z=1, x is within the range of 0 to 0.5, y is within the range of 0.5 to 0.999, z is within the range of 0.001 to 0.20 and t is within the range of 0.001 to 0.25.
Claim 2
Dependent Claim
55 words
A dielectric porcelain composition expressed by the formula: Ba.sub.x Sr.sub.y Ca.sub.z (Zn.sub.1/3 Nb.sub.2/3).sub.1-t Ti.sub.t O.sub.3 in which x+y+z=1, x is within the range of 0 to 0.5, y is within the range of 0.5 to 0.999, z is within the range of 0.001 to 0.20 and t is within the range of 0.001 to 0.25.
Claim 3
Dependent Claim
48 words
The dielectric porcelain composition as claimed in claim 1, in which x is within the range of 0.3 to 0.45, y is within the range of 0.55 to 0.698, z is within the range of 0.002 to 0.008, and t is within the range of 0.002 to 0.008.
References Cited (Backward Citations)
JPS5034759A
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JPS5398098A
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US4248727A
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US4362637A
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US4438214A
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JPS5923045A
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JPS5951086A
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US4610971A
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US4621067A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-04 | 1992-04-04 | 1992-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-04 | 1996-04-04 | 1996-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-04 | 2000-04-04 | 2000-10-04 | $7700.00 | Window Closed / Lapsed |