US4075681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Capacitor with noble metal electrodes
Assignee: EIDP Inc
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Filing: 1975-12-12
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Granted: 1978-02-21
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Expires: 1995-12-12
Abstract
Abstract A process for making multilayer capacitors using electrode compositions of noble metals dispersed in an inert vehicle, said compositions comprising palladium and certain amounts of additive oxide, the additive oxide being selected from among ThO 2 , Gd 2 O 3 , BeO, MgO, ZrO 2 , Al 2 O 3 , CeO 2 , Y 2 O 3 , HfO 2 , BaO, and mixtures thereof. Also the resultant capacitors.
Inventors
- 👤 Michael John Popowich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:09
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/005; H01G4/008; H01G4/0085
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
84 words
A multilayer capacitor of alternating layers of dielectric material and noble metal electrode material, wherein the electrode material is palladium or mixtures or alloys of at least 40% by weight palladium with one or more other noble metals selected from the class consisting of platinum, silver, and gold, plus about 0.2-14%, by weight, additive oxide, based on the total weight of additive oxide and noble metal present, wherein the additive oxide is one or more of ThO 2 and Gd 2 O 3 .
Claim 2
Dependent Claim
84 words
A multilayer capacitor of alternating layers of dielectric material and noble metal electrode material, wherein the electrode material is palladium or mixtures or alloys of at least 40% by weight palladium with one or more other noble metals selected from the class consisting of platinum, silver, and gold, plus about 0.2-14%, by weight, additive oxide, based on the total weight of additive oxide and noble metal present, wherein the additive oxide is one or more of ThO 2 and Gd 2 O 3 .
Claim 3
Dependent Claim
15 words
A mulilayer capacitor according to claim 1 wherein the additive oxide is ThO 2 .
Claim 4
Dependent Claim
17 words
A multilayer capacitor according to claim 1 wherein the additive oxide is Gd 2 O 3 .
Claim 5
Dependent Claim
16 words
A multilayer capacitor according to claim 2 comprising as the additive oxide 0.2-8% ThO 2 .
Claim 6
Dependent Claim
29 words
A multilayer capacitor according to claim 1 wherein the noble metal is Pd or Pd/Ag containing up to 40% Ag, based on the total weight of Pd and Ag.
Claim 7
Dependent Claim
18 words
A multilayer capacitor according to claim 3 comprising as the additive oxide 0.2-14% Gd 2 O 3 .
References Cited (Backward Citations)
US2437212A
Cited
GB981792A
Cited
US3401126A
Cited
US3385799A
Cited
US3394290A
Cited
US3741780A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-20 | 1981-08-22 | 1982-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-20 | 1985-08-22 | 1986-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-20 | 1989-08-22 | 1990-02-21 | $7700.00 | Window Closed / Lapsed |