US4086189A
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Resistive element having voltage non-linearity and method of making same
Assignee: Otowa Electric Co Ltd
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Filing: 1976-09-10
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Granted: 1978-04-25
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Expires: 1996-09-10
Abstract
Abstract A non-linear resistive element which is formed by sintering a body of zinc oxide which includes cobalt, strontium, barium, yttrium and magnesium.
Inventors
- 👤 Tetsuya Honda
- 👤 Kiyoshi Yagi
- 👤 Seiji Shibata
- 👤 Kazuo Yamaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:46
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/10; H01C7/105; H01C7/108; H01C7/112
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
70 words
A resistive element having a high non-linearity and a low ΔV consisting essentially of a sintered body of zinc oxide and cobalt, strontium, barium, yttrium and magnesium in the proportions of 0.2 to 5.0 mol%, 0.2 to 2.0 mol%, 0.05 to 3.0 mol%, 0.05 to 10.0 mol% and 0.05 to 12.0 mol%, respectively, when calculated in the form of oxides, CoO, SrO, BaO, Y 2 O 3 and MgO, respectively.
Claim 2
Dependent Claim
70 words
A resistive element having a high non-linearity and a low ΔV consisting essentially of a sintered body of zinc oxide and cobalt, strontium, barium, yttrium and magnesium in the proportions of 0.2 to 5.0 mol%, 0.2 to 2.0 mol%, 0.05 to 3.0 mol%, 0.05 to 10.0 mol% and 0.05 to 12.0 mol%, respectively, when calculated in the form of oxides, CoO, SrO, BaO, Y 2 O 3 and MgO, respectively.
Claim 3
Dependent Claim
68 words
A resistive element having a high non-linearity and a low ΔV consisting essentially of a sintered body of zinc oxide and compounds of cobalt, strontium, barium, yttrium and magnesium which are contained as CoO at 0.2 to 5.0 mol%, SrO at 0.2 to 2.0 mol%, BaO at 0.05 to 3.0 mol%, Y 2 O 3 at 0.05 to 10.0 mol% and MgO at 0.05 to 12.0 mol%, respectively.
Claim 4
Dependent Claim
68 words
A resistive element having a high non-linearity and a low ΔV consisting essentially of a sintered body of zinc oxide and compounds of cobalt, strontium, barium, yttrium and magnesium which are contained as CoO at 0.2 to 5.0 mol%, SrO at 0.2 to 2.0 mol%, BaO at 0.05 to 3.0 mol%, Y 2 O 3 at 0.05 to 10.0 mol% and MgO at 0.05 to 12.0 mol%, respectively.
Claim 5
Dependent Claim
39 words
A method of manufacturing the resistive element of claim 2, comprising the steps of intermixing cobalt, strontium, barium, yttrium and magnesium in zinc oxide powder in the form of simple substances or compounds, and shaping and sintering this mixture.
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) | 1981-04-24 | 1981-10-24 | 1982-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-24 | 1985-10-24 | 1986-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-24 | 1989-10-24 | 1990-04-25 | $7700.00 | Window Closed / Lapsed |