Patent US3745432A successfully refreshed from Google Patents.
US3745432A
Expired / Lapsed
US
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Impregnated capacitor
Assignee: Monsanto Co
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Filing: 1972-04-28
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Granted: 1973-07-10
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Expires: 1992-04-28
Abstract
Abstract Electrical capacitors are impregnated with liquid dielectric compositions comprising mixed halogenated aliphatic-aromatic ethers.
Inventors
- 👤 R Munch
- 👤 Q Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:45
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/20; H01G4/22; H01G4/221; H01G4/222
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
An electrical capacitor comprising at least two electrodes and a solid insulating dielectric sheet positioned therebetween, the interstices between said dielectric sheet and said electrodes being impregnated with a dielectric liquid composition comprising a mixture of n-butyl-o-chlorophenyl ether and n-butyl-2,4-dichlorophenyl ether in a ratio of from about 1:4 to about 4:1.
Claim 2
Dependent Claim
63 words
An electrical capacitor comprising at least two electrodes and a solid insulating dielectric sheet positioned therebetween, the interstices between said dielectric sheet and said electrodes being impregnated with a dielectric liquid composition comprising a mixture of n-butyl-o-chlorophenyl ether and n-butyl-2,4-dichlorophenyl ether in a ratio of from about 1:4 to about 4:1 and from about 0.1 to 3 percent by weight of 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexane carboxylate.
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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |