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US4550089A
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Microwave dielectric ceramic compositions
Assignee: Oki Electric Industry Co Ltd
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Filing: 1984-05-03
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Granted: 1985-10-29
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Expires: 2004-05-03
Abstract
Abstract A microwave dielectric ceramic composition consisting of 15-19 mol % of barium oxide (BaO), 61-73 mol % of titanium dioxide (TiO 2 ), 3.5-15 mol % of samarium oxide (Sm 2 O 3 ), and 1.5-15 mol % of cerium oxide (CeO 2 ). Since this composition has a high specific dielectric constant ε r and a high no load value Q, it can be used as a microwave resonator, a temperature compensating capacitor or the like.
Inventors
- 👤 Kazutoshi Ayusawa
- 👤 Hosaku Satoh
- 👤 Munetada Kazama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:22
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/46; C04B35/462; C04B35/465; C04B35/468; C04B35/4682; C04B35/4684; H; H01; H01P; H01P7/00; H01P7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A microwave dielectric ceramic composition consisting of 15-19 mol% of barium oxide (BaO), 61-73 mol% of titanium dioxide (TiO 2 ), 3.5-15 mol% of samarium oxide (Sm 2 O 3 ), and 1.5-15 mol% of cerium oxide (CeO 2 ).
Claim 2
Dependent Claim
40 words
A microwave dielectric ceramic composition consisting of 15-19 mol% of barium oxide (BaO), 61-73 mol% of titanium dioxide (TiO 2 ), 3.5-15 mol% of samarium oxide (Sm 2 O 3 ), and 1.5-15 mol% of cerium oxide (CeO 2 ).
References Cited (Backward Citations)
JPS517499A
Cited
JPS5169200A
Cited
DE2941304A1
Cited
US4330631A
Cited
JPS5740805A
Cited
JPS57180007A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-10-28 | 1989-04-29 | 1989-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-28 | 1993-04-29 | 1993-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-28 | 1997-04-29 | 1997-10-29 | $7700.00 | Window Closed / Lapsed |