US4543207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical insulating oil and oil-filled electrical appliances
Assignee: Eneos Corp
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Filing: 1983-12-20
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Granted: 1985-09-24
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Expires: 2003-12-20
Abstract
Abstract An improved electrical insulating oil and oil-filled electrical appliances impregnated therewith. The electrical insulating oil is quite suitable for use in oil-filled electrical appliances in which insulating materials or dielectric materials made of plastics are employed. The electrical insulating oil comprises (a) an electrical insulating oil except polyaromatic hydrocarbons and (b) an aromatic monoolefin and/or diolefin having two condensed or noncondensed aromatic nuclei.
Inventors
- 👤 Atsushi Sato
- 👤 Keiji Endo
- 👤 Shigenobu Kawakami
- 👤 Hitoshi Yanagishita
- 👤 Shozo Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:53
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/20; H01G4/22; H01G4/221; C; C07; C07C; C07C15/00; C07C15/40; C07C15/50; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C33/00; C07C33/18; C07C33/24; C07C33/28; C07C45/00; C07C45/45; C07C45/46; C07C5/00; C07C5/32; C07C5/327; C07C5/333; C07C5/3332; H01B; H01B3/00; H01B3/18; H01B3/20; H01B3/22; C07C2531/00; C07C2531/02; C07C2531/025
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
55 words
An electrical insulating oil consisting essentially of: (a) at least one electrical insulating oil selected from the group consisting of organic acid esters, animal oils, vegetable oils and aromatic ethers, and (b) 0.01 to 50% by weight of at least one of aromatic monoolefins and/or aromatic diolefins each having two condensed or noncondensed aromatic nuclei.
Claim 2
Dependent Claim
55 words
An electrical insulating oil consisting essentially of: (a) at least one electrical insulating oil selected from the group consisting of organic acid esters, animal oils, vegetable oils and aromatic ethers, and (b) 0.01 to 50% by weight of at least one of aromatic monoolefins and/or aromatic diolefins each having two condensed or noncondensed aromatic nuclei.
Claim 3
Dependent Claim
29 words
The electrical insulating oil in claim 1, wherein the viscosity of said electrical insulating oil is not higher than 30 cSt (3×10 -5 m 2 /s) at 40° C.
Claim 4
Dependent Claim
99 words
The electrical insulating oil in claim 1, wherein said aromatic monoolefins are represented by the following general formulae (I) to (IV): ##STR6## wherein R 1 is an alkenylene or cycloalkenylene group, each of R 2 and R 3 is a hydrogen atom or an alkyl group, R 4 is an alkenyl or cycloalkenyl group, R 5 is an alkylene or cycloalkylene group, each of m and n is an integer from zero to three, inclusive, and R 2 of m in number and R 3 of n in number are the same groups or different groups from one another.
Claim 5
Dependent Claim
91 words
The electrical insulating oil in claim 1, wherein said aromatic diolefins are represented by the following general formulae (V) to (VII): ##STR7## wherein each of R 6 , R 7 and R 8 is a hydrocarbon residual group, each of m and n is an integer from zero to three, inclusive, R 6 of m in number, R 7 , and R 8 of n in number are the same groups or different groups from one another, and the total number of double bonds in said hydrocarbon residual groups is two.
Claim 6
Dependent Claim
63 words
An oil-filled electrical appliance which is impregnated with an electrical insulating oil consisting essentially of: (a) at least one electrical insulating oil selected from the group consisting of organic acid esters, animal oils, vegetable oils, and aromatic ethers, and (b) 0.01 to 50% by weight of at least one of aromatic monoolefins and/or aromatic diolefins each having two condensed or noncondensed aromatic nuclei.
Claim 7
Dependent Claim
63 words
An oil-filled electrical appliance which is impregnated with an electrical insulating oil consisting essentially of: (a) at least one electrical insulating oil selected from the group consisting of organic acid esters, animal oils, vegetable oils, and aromatic ethers, and (b) 0.01 to 50% by weight of at least one of aromatic monoolefins and/or aromatic diolefins each having two condensed or noncondensed aromatic nuclei.
Claim 8
Dependent Claim
29 words
The oil-filled electrical appliance in claim 5, wherein the viscosity of said electrical insulating oil is not higher than 30 cSt (3×lO -5 m 2 /s) at 40° C.
Claim 9
Dependent Claim
99 words
The oil-filled electrical appliance in claim 5, wherein said aromatic monoolefins are represented by the following general formulae (I) to (IV): ##STR8## wherein R 1 is an alkenylene or cycloalkenylene group, each of R 2 and R 3 is a hydrogen atom or an alkyl group, R 4 is an alkenyl or cycloalkenyl group, R 5 is an alkylene or cycloalkylene group, each of m and n is an integer from zero to three, inclusive, and R 2 of m in number and R 3 of n in number are the same groups or different groups from one another.
Claim 10
Dependent Claim
91 words
The oil-filled electrical appliance of claim 5, wherein said aromatic diolefins are represented by the following general formulae (V) to (VII): ##STR9## wherein each of R 6 , R 7 and R 8 is a hydrocarbon residual group, each of m and n is an integer from zero to three, inclusive, R 6 of m in number, R 7 , and R 8 of n in number are the same groups or different groups from one another, and the total number of double bonds in said hydrocarbon residual groups is two.
Claim 11
Dependent Claim
26 words
The oil-filled electrical appliance in claim 5, wherein said electrical appliance is one member selected from the group consisting of oil-filled capacitors, oil-filled cables and transformers.
Claim 12
Dependent Claim
29 words
The oil-filled electrical appliance in claim 5, wherein the insulating material or dielectric material used in said oil-filled electrical appliance is insulating paper, synthetic resin film or their combination.
Claim 13
Dependent Claim
18 words
The oil-filled electrical appliance in claim 5, wherein said synthetic resin film is polyethylene film or polypropylene film.
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) | 1988-09-23 | 1989-03-25 | 1989-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-23 | 1993-03-25 | 1993-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-23 | 1997-03-25 | 1997-09-24 | $7700.00 | Window Closed / Lapsed |