US4434209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Capacitor
Assignee: Kureha Corp
•
Filing: 1981-04-01
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Granted: 1984-02-28
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Expires: 2001-04-01
Abstract
Abstract Capacitor having layers of dielectric material containing at least one oriented film prepared by molding a resin composition comprising polyvinylidene fluoride, polycarbonate and/or thermoplastic polyester into un-stretched film and stretching the thus molded un-stretched film as at least a part of the constituents of the layer of dielectric material is disclosed.
Inventors
- 👤 Tohru Sasaki
- 👤 Mitsuru Ohta
- 👤 Syuuzi Terasaki
- 👤 Syozo Kakizaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:33
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/06; H01G4/14; H01G4/18; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31522; Y10T428/3154; Y10T428/31544; Y10T428/31678; Y10T428/31681; Y10T428/31692; Y10T428/31699; Y10T428/31855; Y10T428/31935
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
79 words
A capacitor having layers of dielectric material, at least one of said layers being an oriented plastic film obtained by stretching in at least one direction an unstretched film of a resin composition comprising a mixture of (a) a polyvinylidene fluoride and (b) at least one resin selected from the group consisting of a polycarbonate, a thermoplastic polyester, and a mixture thereof, the weight ratio of (a) to (b) being from 100:0.1 to 100:30 adjacent a metallic electrode layer.
Claim 2
Dependent Claim
79 words
A capacitor having layers of dielectric material, at least one of said layers being an oriented plastic film obtained by stretching in at least one direction an unstretched film of a resin composition comprising a mixture of (a) a polyvinylidene fluoride and (b) at least one resin selected from the group consisting of a polycarbonate, a thermoplastic polyester, and a mixture thereof, the weight ratio of (a) to (b) being from 100:0.1 to 100:30 adjacent a metallic electrode layer.
Claim 3
Dependent Claim
13 words
The capacitor of claim 1 wherein (a) is a homopolymer of vinylidene fluoride.
Claim 4
Dependent Claim
25 words
The capacitor of claim 1 wherein (a) is a copolymer of greater than 50 mole % vinylidene fluoride and a comonomer copolymerizable with vinylidene fluoride.
Claim 5
Dependent Claim
26 words
The capacitor of claim 3 wherein said comonomer polymerizable with vinylidene fluoride is selected from the group consisting of tetrafluoroethylene, hexafluoroethylene, chlorotrifluoroethylene, trifluoroethylene, and vinyl fluoride.
Claim 6
Dependent Claim
28 words
The capacitor of claim 1, 2, or 3, wherein said resin composition comprises 100 parts by weight of (a) and 0.5 to 20 parts by weight of (b).
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) | 1987-02-27 | 1987-08-29 | 1988-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-27 | 1991-08-29 | 1992-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-27 | 1995-08-29 | 1996-02-28 | $7700.00 | Window Closed / Lapsed |