Patent US3818288A successfully refreshed from Google Patents.
US3818288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Capacitor with flame inhibiting core
Assignee: Telephon und Telegraphen Fabriks AG Kapsch und Soehne
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Filing: 1973-05-31
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Granted: 1974-06-18
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Expires: 1993-05-31
Abstract
Abstract A roll-type capacitor includes a roll made of strip-shaped metal electrodes and plastic foils arranged as a dielectric between the electrodes and is surrounded by an envelope of plastic embracing the periphery of the roll. The envelope consists of thermally shrinkable material and contacts the roll under elastic stress. The envelope material may be e.g., polyvinylchloride, that releases flame-inhibiting gases, in particular chlorine, when heated. The roll has a core consisting of a material that releases flame-inhibiting gases when heated. The envelope may consist of a layer or a plurality of layers of a self-sealing shrinkable foil.
Inventors
- 👤 K Wenzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:21
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/224
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
18 words
A capacitor as claimed in claim 1, further comprising an outer housing of non-combustible material surrounding said envelope.
Claim 2
Dependent Claim
14 words
A capacitor as claimed in claim 2, wherein said housing is formed of polyamide.
Claim 3
Dependent Claim
22 words
A capacitor as claimed in claim 2, further comprising a sealing material filling the space between said envelope and said outer housing.
Claim 4
Dependent Claim
14 words
A capacitor as claimed in claim 4, wherein said sealing material comprises epoxy resin.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |