US4381535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dielectric fluid
Assignee: Yosemite Investments Inc
•
Filing: 1981-03-05
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Granted: 1983-04-26
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Expires: 2001-03-05
Abstract
Abstract A dielectric fluid for a capacitor includes a mixture of phthalate ester, polychlorinated benzene and a linear alkylbenzene.
Inventors
- 👤 Vandos Shedigian
- 👤 Gerald A. Voyles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:37
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/20; H01G4/22; H01G4/221; H01G4/222
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
32 words
In a capacitor, a dielectric fluid consisting of a phthalate ester, dodecylbenzene in a percent by volume amount of substantially 20% and 1,2,4-trichlorobenzene in a percent by volume amount of substantially 10%.
Claim 2
Dependent Claim
32 words
In a capacitor, a dielectric fluid consisting of a phthalate ester, dodecylbenzene in a percent by volume amount of substantially 20% and 1,2,4-trichlorobenzene in a percent by volume amount of substantially 10%.
Claim 3
Dependent Claim
30 words
A capacitor comprising a pair of electrically conductive electrodes and a dielectric means separating said electrodes, said dielectric means including a plastic film and the dielectric fluid of claim 1.
Claim 4
Dependent Claim
25 words
The capacitor of claim 1, wherein said plastic film is selected from the group consisting of polypropylene, polyethylene, polyester, polycarbonate, polystyrene, polysulfone and polyethylene terephthalate.
Claim 5
Dependent Claim
45 words
The capacitor of claim 3, wherein said electrodes are convolutely wound and said dielectric means includes two dielectric separators for separating said pair of electrodes when wound, each said separator including a pair of sheets of said plastic film separated by a sheet of paper.
References Cited (Backward Citations)
US2041594A
Cited
US3450968A
Cited
US3363156A
Cited
US3833978A
Cited
GB1528793A
Cited
US4142223A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-04-25 | 1986-10-25 | 1987-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-25 | 1990-10-25 | 1991-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-25 | 1994-10-25 | 1995-04-26 | $7700.00 | Window Closed / Lapsed |