US3611073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diode comprising zinc oxide doped with gallium oxide used as a voltage variable resistor
Assignee: Panasonic Holdings Corp
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Filing: 1969-11-28
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Granted: 1971-10-05
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Expires: 1989-11-28
Abstract
Abstract Voltage variable resistors having nonohmic resistance comprising a sintered wafer consisting essentially of zinc oxide with 0.05 to 10.0 mole of gallium oxide and two electrodes applied to opposite surfaces of said sintered wafer, at least one of said two electrodes being a silver paint electrode.
Inventors
- 👤 Kazuo Hamamoto
- 👤 Michio Matsuoka
- 👤 Takeshi Masuyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:29
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/06; H01B1/08; H01C; H01C17/00; H01C17/28; H01C17/281; H01C17/283; H01C17/285; H01C7/00; H01C7/10; H01C7/105; H01C7/108; H01C7/112
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
25 words
A voltage variable resistor according to claim 1, wherein one of said electrodes is a silver paint electrode and the other is an ohmic electrode.
Claim 2
Dependent Claim
34 words
A voltage variable resistor according to claim 1, wherein said sintered wafer consists essentially of 99.9 to 97.0 mole percent of zinc oxide (ZnO) and 0.1 to 3.0 mole percent of gallium oxide (Ga2O3).
Claim 3
Dependent Claim
43 words
A voltage variable resistor according to claim 1, wherein said sintered wafer consists essentially of 99.8 to 94.0 mole percent of zinc oxide (ZnO), 0.1 TO 3.0 mole percent of gallium oxide (Ga2O3) and 0.1 TO 3.0 mole percent of bismuth oxide (Bi2O3).
Claim 4
Dependent Claim
51 words
A voltage variable resistor according to claim 1, wherein said silver electrode has a composition comprising 70 to 99.5 wt. percent of silver, 0.3 to 27 wt. percent of load oxide (PbO), 0.1 to 15 wt. percent of silicon dioxide (SiO2) and 0.05 to 15 wt. percent of boron trioxide (B2O3).
Claim 5
Dependent Claim
51 words
A voltage variable resistor according to claim 1, wherein said silver electrode has a composition comprising 70 to 99.5 wt. percent of silver 0.3 to 27 wt. percent of bismuth oxide (Bi2O3), 0.03 to 15 wt. percent of silicon dioxide (Si2) and 0.05 TO 15 wt. percent of boron trioxide (B2O3).
Claim 6
Dependent Claim
74 words
A voltage variable resistor according to claim 1, wherein said silver electrode has a composition comprising 70 to 99.5 wt. percent of silver, 0.3 to 27 wt. percent of lead oxide (PbO), 0.1 to 15 wt. percent of silicon dioxide (SiO2), 0.05 to 15 wt. percent of boron trioxide (B2O3) and 0.05 to 6.0 wt. percent of at least one member selected from the group consisting of cobalt oxide (CoO) and manganese oxide (MnO).
Claim 7
Dependent Claim
74 words
A voltage variable resistor according to claim 1, wherein said silver electrode has a composition comprising 70 to 99.5 wt. percent of silver, 0.3 to 27 wt. percent of bismuth oxide (Bi2O3), 0.03 to 15 wt. percent of silicon dioxide (SiO2), 0.05 to 15 wt. percent of boron trioxide (B2O3) and 0.05 to 6.0 wt. percent of at least one member selected from the group consisting of cobalt oxide (CoO) and manganese oxide (MnO).
References Cited (Backward Citations)
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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) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |