US3568015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Capacitor with epoxy scavenger
Assignee: CORNELL-DUBILIER ELECTRONICS Inc
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Filing: 1969-02-12
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Granted: 1971-03-02
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Expires: 1989-02-12
Abstract
Abstract Electrical capacitors in which the dielectric liquid is a halogenated aromatic compound containing as a scavenger a small amount of a condensation product of epichlorhydrin and a tetraphenylolalkane, which product has an epoxide equivalent of less than 400. A preferred condensation product is a resin obtained from 1, 1, 2, 2-tetraphenylolethane.
Inventors
- 👤 Edward Mortin Lobo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:37
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/20; H01G4/22; H01G4/221; H01G4/222
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
22 words
An electrical device as in claim 1 in which said condensation product is a normally solid resin dissolved in said chlorinated compound.
Claim 2
Dependent Claim
22 words
An electrical device as in claim 1 in which said condensation product is a condensation product of 1,1,2,2-tetra (hydroxyphenyl) ethane and epichlorhydrin.
Claim 3
Dependent Claim
25 words
An electrical device as in claim 1 in which condensation product is a normally solid resin having an epoxide equivalent of up to about 240.
Claim 4
Dependent Claim
57 words
An electrical device as in claim 3, said electrical device being a capacitor having aluminum foil electrodes, a paper dielectric between said electrodes, and said dielectric liquid impregnating said paper, said chlorinated aromatic compound being trichlorodiphenyl and said condensation product being a normally solid resin dissolved in the liquid in a concentration of about one half percent.
Claim 5
Dependent Claim
22 words
An electrical device as in claim 1, said electrical device being a capacitor having wound electrodes and dielectric strips separating the electrodes.
Claim 6
Dependent Claim
30 words
An electrical device as in claim 1, said electrical device being a capacitor having wound electrodes and paper strips separating said electrodes, and said dielectric liquid impregnating said paper strips.
Claim 7
Dependent Claim
18 words
An electrical device as in claim 7 wherein said paper contains a small percentage of highly adsorbent alumina.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |