US4215385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regenerable electric capacitor
Assignee: Siemens AG
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Filing: 1977-12-23
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Granted: 1980-07-29
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Expires: 1997-12-23
Abstract
Abstract In a regenerable electric capacitor, particularly for a.c. voltage applications, the metal coatings consist of an alloy of aluminum and a metal whose oxides possess a specific resistance ρ<10 9 Ωcm. Alloy metals are preferably copper or zinc, and maganese, tin, silver, chromium, iron or lead are also suitable. With the alloy of the invention, the coating decomposition is prevented by the increased edge field strengths.
Inventors
- 👤 Reinhard Behn
- 👤 Gerhard Hoyler
- 👤 Walter Voelkl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:05
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/005; H01G4/008; H01G4/015
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
In a regenerable electric capacitor, in particular for a.c. voltage applications, of the type in which wound layers of synthetic foils carry metal coatings and capacitor plates and wherein metal-free edge strips are arranged on the longitudinal sides of the foils, the improvement wherein said metal coatings comprise an alloy of aluminum and at least one metal whose oxide has a specific resistance ρ<10.sup.9 Ωcm, wherein said at least one metal is copper.
Claim 2
Dependent Claim
73 words
In a regenerable electric capacitor, in particular for a.c. voltage applications, of the type in which wound layers of synthetic foils carry metal coatings and capacitor plates and wherein metal-free edge strips are arranged on the longitudinal sides of the foils, the improvement wherein said metal coatings comprise an alloy of aluminum and at least one metal whose oxide has a specific resistance ρ<10.sup.9 Ωcm, wherein said at least one metal is copper.
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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) | 1983-07-29 | 1984-01-28 | 1984-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-29 | 1988-01-28 | 1988-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-29 | 1992-01-28 | 1992-07-29 | $7700.00 | Window Closed / Lapsed |