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US4330631A
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Dielectric ceramics
Assignee: Panasonic Holdings Corp
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Filing: 1981-06-24
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Granted: 1982-05-18
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Expires: 2001-06-24
Abstract
Abstract A dielectric ceramic consisting essentially of a solid solution represented by the formula: xBaO--yTiO.sub.2 --zSm.sub.2 O.sub.3 wherein 5≦x≦23, 57≦y≦82.5, 2.5≦z≦37.5, and x+y+z=100. The dielectric ceramic exibits large dielectric constant and low microwave loss with high temperature-stability in resonant frequency and is suitable for use as dielectric resonators, electrical filters, substrates and other uses.
Inventors
- 👤 Syunichiro Kawashima
- 👤 Masamitsu Nishida
- 👤 Ichiro Ueda
- 👤 Hiromu Ouchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:51
CPC Classifications
H; H10; H10W; H10W70/00; H10W70/60; H10W70/67; H10W70/69; H10W70/692; C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4686
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A dielectric ceramic composition consisting of barium oxide, titanium oxide and samarium oxide characterized in that, when its composition formula is represented by xBaO--yTiO 2 --zSm 2 O 3 , its ingredient composition represented in terms of percentage by mole falls in the following range: 5≦x≦23, 57≦y≦82.5 and 2.5≦z≦37.5, provided that x+y+z=100.
Claim 2
Dependent Claim
52 words
A dielectric ceramic composition consisting of barium oxide, titanium oxide and samarium oxide characterized in that, when its composition formula is represented by xBaO--yTiO 2 --zSm 2 O 3 , its ingredient composition represented in terms of percentage by mole falls in the following range: 5≦x≦23, 57≦y≦82.5 and 2.5≦z≦37.5, provided that x+y+z=100.
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) | 1985-05-17 | 1985-11-16 | 1986-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-17 | 1989-11-16 | 1990-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-17 | 1993-11-16 | 1994-05-18 | $7700.00 | Window Closed / Lapsed |