US4473812A
Expired / Lapsed
US
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Voltage-dependent nonlinear resistor
Assignee: Fuji Electric Co Ltd
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Filing: 1983-06-30
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Granted: 1984-09-25
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Expires: 2003-06-30
Abstract
Abstract A voltage-dependent nonlinear resistor containing ZnO as a main component and six auxiliary components, i.e., (1) a rare earth element; (2) Co; (3) at least one of Mg and Ca; (4) at least one of K, Rb and Cs, (5) as well as Cr; and (6) B which may be combined with at least one of Al, Ga and In. Alternatively, the auxiliary components may be (1) a rare earth element; (2) Co; (3) at least one of K, Rb and Cs; (4) Cr; (5) B; and (6) at least one of Al, Ga and In. The voltage-dependent nonlinear resistor of the present invention has high resistance to both long and short wave-tail surge currents and has an extended service life without sacrificing good nonlinearity.
Inventors
- 👤 Satoshi Maruyama
- 👤 Koichi Tsuda
- 👤 Kazuo Mukae
- 👤 Ikuo Nagasawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:29
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/10; H01C7/105; H01C7/108; H01C7/112
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
50 words
A voltage-dependent nonlinear resistor containing ZnO as the primary component and auxiliary components wherein said auxiliary components comprise: (1) at least one of rare earth elements; (2) Co; (3) at least one of Mg and Ca; (4) at least one of K, Rb and Cs; (5) Cr and (6) B.
Claim 2
Dependent Claim
50 words
A voltage-dependent nonlinear resistor containing ZnO as the primary component and auxiliary components wherein said auxiliary components comprise: (1) at least one of rare earth elements; (2) Co; (3) at least one of Mg and Ca; (4) at least one of K, Rb and Cs; (5) Cr and (6) B.
Claim 3
Dependent Claim
22 words
A voltage-dependent nonlinear resistor as in claim 1, wherein said auxiliary components additionally comprise at least one of Al, Ga and In.
Claim 4
Dependent Claim
131 words
A voltage-dependent nonlinear resistor as in claim 2, wherein said at least one of rare earth elements is present in an amount of 0.08 to 5.0 atm %, said Co is present in an amount of 0.1 to 10 atm %, said at least one of Mg and Ca is present in an amount of 0.01 to 5.0 atm %, said at least one of K, Cs and Rb is present in an amount of 0.01 to 1.0 atm %, said Cr is present in an amount of 0.01 to 1.0 atm %, said B is present in an amount of 5×10 -4 to 1×10 -1 atm % and said at least one of Al, Ga and In is present in an amount of 1×10 -4 to 5×10 -2 atm %.
Claim 5
Dependent Claim
109 words
A voltage-dependent nonlinear resistor as in claim 1, wherein said at least one of rare earth elements is present in an amount of 0.08 to 5.0 atm %, said Co is present in an amount of 0.1 to 10.0 atm %, said at least one of Mg and Ca is present in an amount of 0.01 to 5.0 atm %, said at least one of K, Cs and Rb is present in an amount of 0.01 to 1.0 atm %, said Cr is present in an amount of 0.01 to 1.0 atm % and said B is present in an amount of 5×10 -4 to 1×10 -1 atm %.
Claim 6
Dependent Claim
42 words
A voltage-dependent nonlinear resistor containing ZnO as the primary component and auxiliary components wherein said auxiliary components comprise: (1) at least one of rare earth elements; (2) Co; (3) at least one of K, Cs and Rb; (4) Cr; and (5) B.
Claim 7
Dependent Claim
42 words
A voltage-dependent nonlinear resistor containing ZnO as the primary component and auxiliary components wherein said auxiliary components comprise: (1) at least one of rare earth elements; (2) Co; (3) at least one of K, Cs and Rb; (4) Cr; and (5) B.
Claim 8
Dependent Claim
22 words
A voltage-dependent nonlinear resistor as in claim 5, wherein said auxiliary components additionally comprise at least one of Al, Ga and In.
Claim 9
Dependent Claim
112 words
A voltage-dependent nonlinear resistor as in claim 6, wherein said at least one or rare earth elements is present in an amount of 0.08 to 5.0 atm %, said Co is present in an amount of 0.01 to 10 atm %, said at least one of K, Cs and Rb is present in an amount of 0.01 to 1.0 atm %, said Cr is present in an amount of 0.01 to 1.0 atm %, said B is present in an amount of 5×10 -4 to 1×10 -1 atm % and said at least one of Al, Ga and In is present in an amount of 1×10 -4 to 5×10 -2 atm %.
References Cited (Backward Citations)
US4038217A
Cited
US4045374A
Cited
US4069061A
Cited
US4091144A
Cited
US4169071A
Cited
US4160748A
Cited
US4285839A
Cited
US4386022A
Cited
US4326187A
Cited
US4383237A
Cited
US4397775A
Cited
US4436650A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-25 | 1988-03-26 | 1988-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-25 | 1992-03-26 | 1992-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-25 | 1996-03-26 | 1996-09-25 | $7700.00 | Window Closed / Lapsed |