Patent US3585468A successfully refreshed from Google Patents.
US3585468A
Expired / Lapsed
US
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Thermoplastic jacketed thermoplastic capacitor
Assignee: SPRAQUE ELECTRIC CO
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Filing: 1968-11-27
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Granted: 1971-06-15
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Expires: 1988-11-27
Abstract
Abstract A capacitor section has convolutely wound metal electrodes separated by at least one film of a polyolefin dielectric material. The volume ratio of polyolefin to metal electrode is at least 3:2. Electrode leads are in contact with the electrodes. An encapsulating jacket surrounds and is thermally bonded to said section. The jacket is of the same species as that of the dielectric film.
Inventors
- 👤 Sidney L Chertok
- 👤 David B Peck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:52
CPC Classifications
H; H01; H01G; H01G2/00; H01G2/12; H01G4/00; H01G4/32
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
30 words
The capacitor of claim 1 wherein said preformed spacing means is a preformed half shell which generally conforms to the configuration defined by one longitudinal half of said capacitor section.
Claim 2
Dependent Claim
19 words
The capacitor of claim 1 wherein said preformed spacing means is a preformed tube accommodating said capacitor section therewithin.
Claim 3
Dependent Claim
24 words
The capacitor of claim 3 wherein said tube has at least two inwardly extending appendages adapted to center said capacitor section within said tube.
Claim 4
Dependent Claim
20 words
The capacitor of claim 1 wherein said films are heat-Shrunken biaxially oriented polypropylene films and said electrodes are aluminum foils.
Claim 5
Dependent Claim
37 words
The capacitor of claim 1 wherein said films have a thickness of from 0.1 to 1.0 mil and said electrodes are metal deposits of from 100 to 500 Angstroms selected from aluminum and zinc on said films.
References Cited (Backward Citations)
US2935668A
Cited
US2816273A
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US3319141A
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US3237274A
Cited
US3371295A
Cited
US3436610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |