US4330439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric device comprising impregnated insulating materials and electric elements
Assignee: Kureha Corp
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Filing: 1980-10-29
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Granted: 1982-05-18
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Expires: 2000-10-29
Abstract
Abstract The electric device according to the present invention has as its constituents the insulating materials and elements comprising films of synthetic resin, for instance, polypropylene, impregnated with 1-phenyl-2-ethylphenylethane and/or 1-phenyl-2-isopropylphenylethane. According to the present invention, insulating oils having favorable compatibility with the film of synthetic resin such as polypropylene and favorable affinity to metals and having low viscosity have been provided, and in addition, electric devices excellent in properties of withstanding a high voltage and dielectric properties in a broad range of temperature from a low temperature to a high temperature have also been offered.
Inventors
- 👤 Mineaki Nishimatsu
- 👤 Sadayoshi Mukai
- 👤 Yoshinori Hayashi
- 👤 Osamu Yamaguchi
- 👤 Akira Ito
- 👤 Nobuo Ahiko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:56
CPC Classifications
C; C10; C10M; C10M105/00; C10M105/02; C10M105/06; H; H01; H01B; H01B3/00; H01B3/18; H01B3/20; H01B3/22; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/20; H01G4/22; H01G4/221; C10M2203/00; C10M2203/06; C10N; C10N2040/00; C10N2040/14; C10N2040/16; C10N2040/17
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
60 words
An oil-impregnated electric device containing as its component an electric element selected from the group consisting of capacitors, cables, and transformers comprising a film of synthetic resin selected from the group consisting of polyolefins, polyesters, and polyvinylidene fluoride, wherein said electric element comprising a synthetic resin film is impregnated with an insulating oil selected from 1-phenyl-2-ethylphenylethane, 1-phenyl-2-isopropylphenylethane and mixtures thereof.
Claim 2
Dependent Claim
60 words
An oil-impregnated electric device containing as its component an electric element selected from the group consisting of capacitors, cables, and transformers comprising a film of synthetic resin selected from the group consisting of polyolefins, polyesters, and polyvinylidene fluoride, wherein said electric element comprising a synthetic resin film is impregnated with an insulating oil selected from 1-phenyl-2-ethylphenylethane, 1-phenyl-2-isopropylphenylethane and mixtures thereof.
Claim 3
Dependent Claim
17 words
The electric device according to claim 1, wherein said electric element consists of a synthetic resin film.
Claim 4
Dependent Claim
21 words
The electric device according to claim 1, wherein said electric element consists of a synthetic resin film and an insulating paper.
Claim 5
Dependent Claim
35 words
The electric device according to any one of claims 1 to 3, wherein said electric element is a capacitor element for alternating current and comprises film(s) of a synthetic resin selected from polyolefins and polyesters.
Claim 6
Dependent Claim
36 words
The electric device according to any one of claims 1 to 3, wherein said electric element is capacitor element for direct current and comprises film(s) of a synthetic resin selected from polyolefins, polyesters and polyvinylidene fluoride.
Claim 7
Dependent Claim
25 words
The electric device according to claim 3, wherein said electric element is an oil-filled cable element and comprises a polyolefin film and an insulating paper.
Claim 8
Dependent Claim
21 words
The electric device according to any one of claims 1 to 3, wherein said synthetic resin film is a polyolefin film.
Claim 9
Dependent Claim
21 words
The electric device according to any one of claims 1 to 3, wherein said synthetic resin film is a polypropylene film.
Claim 10
Dependent Claim
13 words
The electric device according to claim 4, wherein said polyester is poly(ethylene terephthalate).
Claim 11
Dependent Claim
13 words
The electric device according to claim 5, wherein said polyester is poly(ethylene terephthalate).
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) | 1985-05-17 | 1985-11-16 | 1986-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-17 | 1989-11-16 | 1990-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-17 | 1993-11-16 | 1994-05-18 | $7700.00 | Window Closed / Lapsed |