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Patent US4082866A successfully refreshed from Google Patents.
US4082866A
Expired / Lapsed
US
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Method of use and electrical equipment utilizing insulating oil consisting of a saturated hydrocarbon oil
Assignee: Cooper Power Acquisition Corp
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Filing: 1975-09-25
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Granted: 1978-04-04
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Expires: 1995-09-25
Abstract
Abstract The unique, relatively nonflammable, environmentally safe, insulating oil comprises a saturated hydrocarbon oil having a molecular weight of about 500 to about 700, and a fire point above 200° C. The electrical equipment comprises an oil-sealed tank, a unique insulating oil filling said tank, and an electrical component such as a conductive coil immersed in said insulating oil. A method of filling the oil-sealed tank of an electrical apparatus with the unique insulating oil also is disclosed.
Inventors
- 👤 Edwin A. Link
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:15
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/28; H01F27/32; H01F27/321; H01B; H01B3/00; H01B3/18; H01B3/20; H01B3/22
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
74 words
The method of minimizing the detrimental effects that can result in oil filled electrical apparatus during high fault conditions which comprises employing as an insulating oil in such electrical apparatus a relatively nonflammable and biodegradable oil consisting essentially of a saturated hydrocarbon oil having an average molecular weight of about 500 to about 700 and a fire point above 200° C, which oil is liquid throughout the temperature range of 0° to 40° C.
Claim 2
Independent Claim
74 words
The method of minimizing the detrimental effects that can result in oil filled electrical apparatus during high fault conditions which comprises employing as an insulating oil in such electrical apparatus a relatively nonflammable and biodegradable oil consisting essentially of a saturated hydrocarbon oil having an average molecular weight of about 500 to about 700 and a fire point above 200° C, which oil is liquid throughout the temperature range of 0° to 40° C.
Claim 3
Dependent Claim
35 words
The method of claim 1 in which the saturated hydrocarbon oil is selected from oils consisting essentially of (a) straight and branch chain aliphatic hydrocarbons, (b) naphthenic hydrocarbons, and (c) mixtures of (a) and (b).
Claim 4
Dependent Claim
18 words
The method of claim 1 in which the oil consists essentially of straight and branch chain aliphatic hydrocarbons.
Claim 5
Dependent Claim
14 words
The method of claim 1 in which the oil consists essentially of naphthenic hydrocarbons.
Claim 6
Dependent Claim
77 words
In an electrical apparatus comprised of an oil tank, an electrical component in the tank and an insulating oil filling said tank, the improved insulating oil which minimizes the detrimental effects that can result during high fault conditions and consists essentially of a saturated hydrocarbon oil having an average molecular weight of about 500 to about 700 and a fire point above 200° C, which oil is liquid throughout the temperature range of 0° to 40° C.
Claim 7
Dependent Claim
77 words
In an electrical apparatus comprised of an oil tank, an electrical component in the tank and an insulating oil filling said tank, the improved insulating oil which minimizes the detrimental effects that can result during high fault conditions and consists essentially of a saturated hydrocarbon oil having an average molecular weight of about 500 to about 700 and a fire point above 200° C, which oil is liquid throughout the temperature range of 0° to 40° C.
Claim 8
Dependent Claim
34 words
The electrical apparatus of claim 5 in which the oil is selected from oils consisting essentially of (a) straight and branch chain aliphatic hydrocarbons, (b) naphthenic hydrocarbons, and (c) mixtures of (a) and (b).
Claim 9
Dependent Claim
20 words
The electrical apparatus of claim 5 in which the insulating oil consists essentially of straight and branched chain aliphatic hydrocarbons.
Claim 10
Dependent Claim
16 words
The electrical apparatus of claim 5 in which the insulating oil consists essentially of naphthenic hydrocarbons.
Claim 11
Dependent Claim
59 words
In the method of impregnating an electrical apparatus with an insulating oil under vacuum, the improvement which comprises utilizing as the impregnating insulating oil a relatively nonflammable, environmentally safe biodegradable oil having a fire point above 200° C, said oil being a liquid consisting essentially of saturated hydrocarbons having an average molecular weight of about 500 to about 700.
Claim 12
Dependent Claim
59 words
In the method of impregnating an electrical apparatus with an insulating oil under vacuum, the improvement which comprises utilizing as the impregnating insulating oil a relatively nonflammable, environmentally safe biodegradable oil having a fire point above 200° C, said oil being a liquid consisting essentially of saturated hydrocarbons having an average molecular weight of about 500 to about 700.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-03 | 1981-10-03 | 1982-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-03 | 1985-10-03 | 1986-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-03 | 1989-10-03 | 1990-04-04 | $7700.00 | Window Closed / Lapsed |