US4131931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impregnated capacitor
Assignee: Nichicon Corp
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Filing: 1978-02-14
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Granted: 1978-12-26
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Expires: 1998-02-14
Abstract
Abstract A rolled capacitor which includes metal foils interleaved with insulating films and wherein each of the films include metal layer on one side and a roughened surface on the other side.
Inventors
- 👤 Shigeyoshi Nishikawa
- 👤 Takashi Muroshima
- 👤 Hirokazu Sakaguchi
- 👤 Morihiko Hasebe
- 👤 Katsuji Katagiri
- 👤 Kazuo Inoue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:13
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/32; H01G4/002; H01G4/018; H01G4/20; H01G4/22
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
41 words
A rolled capacitor, comprising a plurality of metal electrode foils and a plurality of insulator separation films, wherein each of said films consists of a synthetic resin film having one surface roughened and the other surface coated with a metal layer.
Claim 2
Dependent Claim
41 words
A rolled capacitor, comprising a plurality of metal electrode foils and a plurality of insulator separation films, wherein each of said films consists of a synthetic resin film having one surface roughened and the other surface coated with a metal layer.
Claim 3
Dependent Claim
27 words
A rolled capacitor, according to claim 1 wherein said films are oriented such that said roughened surfaces of adjoining films are not in contact with each other.
Claim 4
Dependent Claim
26 words
A rolled capacitor, according to claim 1 wherein said resin films are formed from a resin selected from the group consisting of polypropylene and polyethylene terephalate.
Claim 5
Dependent Claim
14 words
A rolled capacitor according to claim 3 wherein said capacitor is impregnated with alkylbenzene.
Claim 6
Dependent Claim
25 words
A rolled capacitor according to claim 1 wherein said metal layer is formed of a metal selected from the group consisting of aluminum and zinc.
References Cited (Backward Citations)
US3522496A
Cited
US3484664A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-25 | 1982-06-26 | 1982-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-25 | 1986-06-26 | 1986-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-25 | 1990-06-26 | 1990-12-26 | $7700.00 | Window Closed / Lapsed |