US4383237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage-dependent resistor
Assignee: Panasonic Holdings Corp
•
Filing: 1981-05-05
•
Granted: 1983-05-10
•
Expires: 2001-05-05
Abstract
Abstract A voltage-dependent resistor of the layered structure type is provided by employing the nonohmic property of the hetero-junction between a zinc oxide layer and a metal oxide layer consisting essentially of at least one member selected from the group consisting of cobalt oxide, manganese oxide, barium oxide, strontium oxide, lead oxide and rare earth oxides.
Inventors
- 👤 Kazuo Eda
- 👤 Yasuharu Kikuchi
- 👤 Michio Matsuoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:04
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/10; H01C7/102
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
71 words
A voltage-dependent resistor of layered structure type, comprising a zinc oxide layer adjacent to a metal oxide layer consisting of at least one member selected from the group consisting of cobalt oxide (Co 2 O 3 ), manganese oxide (MnO 2 ), barium oxide (BaO), strontium oxide (SrO), lead oxide (PbO) and rare earth oxides with electrodes applied to opposite surfaces of said zinc oxide layer and said metal oxide layer.
Claim 2
Dependent Claim
71 words
A voltage-dependent resistor of layered structure type, comprising a zinc oxide layer adjacent to a metal oxide layer consisting of at least one member selected from the group consisting of cobalt oxide (Co 2 O 3 ), manganese oxide (MnO 2 ), barium oxide (BaO), strontium oxide (SrO), lead oxide (PbO) and rare earth oxides with electrodes applied to opposite surfaces of said zinc oxide layer and said metal oxide layer.
Claim 3
Dependent Claim
14 words
The voltage-dependent resistor according to claim 1, wherein said electrodes are made of aluminum.
Claim 4
Dependent Claim
65 words
A voltage-dependent resistor of layered structure type, comprising a metal oxide layer consisting of at least one member selected from the group consisting of cobalt oxide (Co 2 O 3 ), manganese oxide (MnO 2 ), barium oxide (BaO), strontium oxide (SrO), lead oxide (PbO) and rare earth oxides sandwiched between zinc oxide layers with electrodes applied to opposite surfaces of said zinc oxide layers.
Claim 5
Dependent Claim
65 words
A voltage-dependent resistor of layered structure type, comprising a metal oxide layer consisting of at least one member selected from the group consisting of cobalt oxide (Co 2 O 3 ), manganese oxide (MnO 2 ), barium oxide (BaO), strontium oxide (SrO), lead oxide (PbO) and rare earth oxides sandwiched between zinc oxide layers with electrodes applied to opposite surfaces of said zinc oxide layers.
Claim 6
Dependent Claim
50 words
The voltage-dependent resistor according to claim 3, wherein said zinc oxide layers composition comprises at least one member selected from the group consisting of 0.001 to 0.1 mole percent of aluminum (Al 2 O 3 ) and 0.001 to 0.1 mole percent of gallium oxide (Ga 2 O 3 ).
Claim 7
Dependent Claim
25 words
The voltage-dependent resistor according to claim 3, wherein one of said zinc oxide layer comprises a sintered body of zinc oxide as a main constituent.
Claim 8
Dependent Claim
22 words
The voltage-dependent resistor according to claim 3, wherein said zinc oxide layer comprises a deposited layer of zinc oxide as main constituent.
Claim 9
Dependent Claim
23 words
The voltage-dependent resistor according to claim 1, wherein said zinc oxide layer comprises a sintered body of zinc oxide as a main constituent.
References Cited (Backward Citations)
US3611073A
Cited
US3689863A
Cited
US3953375A
Cited
JPS5070897A
Cited
DE2553134A1
Cited
US4046847A
Cited
US4272754A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-09 | 1986-11-08 | 1987-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-09 | 1990-11-08 | 1991-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-09 | 1994-11-08 | 1995-05-10 | $7700.00 | Window Closed / Lapsed |