Patent US4265935A successfully refreshed from Google Patents.
Patent US4477793A successfully refreshed from Google Patents.
US4477793A
Expired / Lapsed
US
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Zinc oxide non-linear resistor
Assignee: Fuji Electric Co Ltd
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Filing: 1983-06-29
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Granted: 1984-10-16
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Expires: 2003-06-29
Abstract
Abstract A voltage non-linear resistor in the form of a sintered body is disclosed. The sintered body is comprised of 0.08 to 5.0 atomic % of a rare earth element, 0.1. to 10 atomic % of cobalt, 5x10-4 to 1x10-1 atomic % of boron and an additional component which may be 0.01 to 5.0 atomic % of magnesium or calcium and/or 1x10-4 to 5x10-2 atomic % of aluminum, gallium or indium. The remainder of the sintered body is comprised of zinc oxide. The sintered body provides a small voltage non-linear resistor with high discharge current withstand capability and good life performance.
Inventors
- 👤 Kazuo Mukae
- 👤 Satoshi Maruyama
- 👤 Koichi Tsuda
- 👤 Ikuo Nagasawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:36
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/10; H01C7/105; H01C7/108; H01C7/112
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
79 words
A voltage non-linear resistor comprising a sintered body composed of a main component of zinc oxide, and additives of (i) a total of 0.08 to 5.0 atomic % of at least one rare earth element; (ii) 0.1 to 10.0 atomic % of cobalt; (iii) 5×10 -4 to 1×10 -1 atomic % of boron; and (iv) a total of 1×10 -4 to 5×10 -2 atomic % of at least one component selected from the group of aluminum, gallium, and indium.
Claim 2
Dependent Claim
79 words
A voltage non-linear resistor comprising a sintered body composed of a main component of zinc oxide, and additives of (i) a total of 0.08 to 5.0 atomic % of at least one rare earth element; (ii) 0.1 to 10.0 atomic % of cobalt; (iii) 5×10 -4 to 1×10 -1 atomic % of boron; and (iv) a total of 1×10 -4 to 5×10 -2 atomic % of at least one component selected from the group of aluminum, gallium, and indium.
Claim 3
Dependent Claim
101 words
A voltage non-linear resistor comprising a sintered body composed of a main component of zinc oxide, and additives of (i) a total of 0.08 to 5.0 atomic % of at least one rare earth element; (ii) 0.1 to 10.0 atomic % of cobalt; (iii) 5×10 -4 to 1×10 -1 atomic % of boron; (iv) a total of 1×10 -4 to 5×10 -2 atomic % of at least one component selected from the group of aluminum, gallium and indium, and (v) a total of 0.01 to 5.0 atomic % of at least one component selected from the group of magnesium and calcium.
Claim 4
Dependent Claim
101 words
A voltage non-linear resistor comprising a sintered body composed of a main component of zinc oxide, and additives of (i) a total of 0.08 to 5.0 atomic % of at least one rare earth element; (ii) 0.1 to 10.0 atomic % of cobalt; (iii) 5×10 -4 to 1×10 -1 atomic % of boron; (iv) a total of 1×10 -4 to 5×10 -2 atomic % of at least one component selected from the group of aluminum, gallium and indium, and (v) a total of 0.01 to 5.0 atomic % of at least one component selected from the group of magnesium and calcium.
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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) | 1987-10-16 | 1988-04-16 | 1988-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-16 | 1992-04-16 | 1992-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-16 | 1996-04-16 | 1996-10-16 | $7700.00 | Window Closed / Lapsed |