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US3649892A
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Capacitors utilizing bonded discrete polymeric film dielectrics
Assignee: Duracell Inc USA
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Filing: 1970-07-13
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Granted: 1972-03-14
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Expires: 1990-07-13
Abstract
Abstract Capacitors employing discrete polymeric film dielectrics adhesively bonded to metal foil electrodes have been found to be effective up to and including high-voltage applications of either AC or DC.
Inventors
- 👤 James M Booe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:53
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/32; H01G4/002; H01G4/018; H01G4/06; H01G4/14; H01G4/18
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
27 words
A capacitor according to claim 1 in which said film is made from a polymeric material selected from olefin polymers, condensation polymers, and polymers containing heterocyclic linkages.
Claim 2
Dependent Claim
21 words
A capacitor according to claim 1 in which said first and second electrodes are made of the same meTal or alloy.
Claim 3
Dependent Claim
20 words
A capacitor according to claim 3 in which said first and second electrodes are made of aluminum or aluminum alloy.
Claim 4
Dependent Claim
35 words
A capacitor according to claim 2 in which the film is made of an olefin polymer selected from the group consisting of vinyl, vinylidine, acrylics, vinylene, aromatic and aromatic derivative type polymers and copolymers thereof.
Claim 5
Dependent Claim
34 words
A capacitor according to claim 2 in which the film is made of a condensation polymer selected from the group consisting of esters, polycarbonates, polyamides, polyurethanes, polymers based on heterocyclic linkages and combinations thereof.
Claim 6
Dependent Claim
18 words
A capacitor according to claim 1 in which said adhesive bonding agent is a polymeric adhesive bonding agent.
Claim 7
Dependent Claim
27 words
A capacitor according to claim 1 in which said bonding agent fills substantially all void spaces at least at the edges between said film and electrode foils.
Claim 8
Dependent Claim
34 words
A capacitor according to claim 7 in which said polymeric bonding agent is selected from the group consisting of dried solids, having been applied from a solution, fusible tape and solventless liquid bonding agents.
Claim 9
Dependent Claim
24 words
A capacitor according to claim 9 in which said dried solids having been applied from a solution is selected from thermoplastic and thermosetting materials.
Claim 10
Dependent Claim
13 words
A capacitor according to claim 6 in which said film is polyimide film.
Claim 11
Dependent Claim
13 words
A capacitor according to claim 7 in which said film is polyethylene terephthalate.
Claim 12
Dependent Claim
21 words
A capacitor according to claim 1 in which more than one polymeric films is utilized between said electrodes in the capacitor.
Claim 13
Dependent Claim
19 words
A capacitor according to claim 13 in which at least one of the films in said capacitor is polyimide.
Claim 14
Dependent Claim
17 words
A capacitor according to claim 13 in which at least one of said films is polyethylene terephthalate.
Claim 15
Dependent Claim
26 words
A capacitor according to claim 6 in which said polymeric film is made from a material selected from the group consisting of polysulfone, polybenzimidazole and polycarbonate.
Claim 16
Dependent Claim
26 words
A capacitor according to claim 5 in which said film is made from a polymer selected from the group consisting of polystyrene, polyethylene, polypropylene, polyvinylfluoride, polytetrafluorethylene.
Claim 17
Dependent Claim
24 words
A capacitor according to claim 13 in which the dielectric films have at least slightly higher insulation resistance than that of the bonding agent.
Claim 18
Dependent Claim
26 words
A capacitor according to claim 1 wherein said first and second electrodes are foils and wherein said foils and said polymeric film comprise a stacked assembly.
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) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |