US4621067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dielectric ceramic composition
Assignee: Ube Corp
•
Filing: 1984-12-26
•
Granted: 1986-11-04
•
Expires: 2004-12-26
Abstract
Abstract A dielectric ceramic composition comprising oxides of strontium, zinc, niobium, and titanium, which is represented by the following composition formula; Sr1(Zn1/3Nb2/3)1-xTixO3 wherein Sr stands for strontium, Zn stands for zinc, Nb stands for niobium, Ti stands for titanium, O stands for oxygen, each suffix indicates the number of atoms, and x is a value larger than 0 but not larger than 0.5. This dielectric ceramic composition can be used not only as a dielectric resonator or a material thereof but also as a material of a dielectric substrate for a microwave IC or a dielectric adjusting rod.
Inventors
- 👤 Ryozo Kitoh
- 👤 Harumi Ikezawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:01
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/495; C04B35/46; C04B35/462; C04B35/465; C04B35/47
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
68 words
A dielectric ceramic composition consisting essentially of oxides of strontium, zinc, niobium, and titanium, which is represented by the following composition formula, Sr.sub.1 (Zn.sub.1/3 Nb.sub.2/3).sub.1-x Ti.sub.x O.sub.3 wherein Sr stands for strontium, Zn stands for zinc, Nb stands for niobium, Ti stands for titanium, O stands for oxygen, each suffix indicates the number of atoms, and x is a value larger than 0 but not larger than 0.5.
Claim 2
Dependent Claim
68 words
A dielectric ceramic composition consisting essentially of oxides of strontium, zinc, niobium, and titanium, which is represented by the following composition formula, Sr.sub.1 (Zn.sub.1/3 Nb.sub.2/3).sub.1-x Ti.sub.x O.sub.3 wherein Sr stands for strontium, Zn stands for zinc, Nb stands for niobium, Ti stands for titanium, O stands for oxygen, each suffix indicates the number of atoms, and x is a value larger than 0 but not larger than 0.5.
Claim 3
Dependent Claim
20 words
A dielectric ceramic composition as set forth in claim 1, wherein x is a number of from 0.1 to 0.3.
Claim 4
Dependent Claim
25 words
A dielectric ceramic composition as set forth in claim 1, suitable for use in the fabrication of a dielectric resonator for a microwave frequency band.
Claim 5
Dependent Claim
20 words
A dielectric ceramic composition as set forth in claim 3, wherein the microwave frequency band is 2 to 6 GHz.
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) | 1989-11-03 | 1990-05-05 | 1990-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-03 | 1994-05-05 | 1994-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-03 | 1998-05-05 | 1998-11-04 | $7700.00 | Window Closed / Lapsed |