Patent US4053941A successfully refreshed from Google Patents.
US4053941A
Expired / Lapsed
US
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Oil impregnated electric device
Assignee: Panasonic Holdings Corp
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Filing: 1975-06-06
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Granted: 1977-10-11
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Expires: 1995-06-06
Abstract
Abstract There is disclosed an oil impregnated electric device in which an element of the device is impregnated with a mixture of an arylalkane compound such as 1,1-phenylxylyl ethane and an organic phosphorus compound such as phosphate or phosphite. Such electric device has a high power density (i.e., capable of withstanding high electric field) and a high reliability.
Inventors
- 👤 Tokihiko Shimizu
- 👤 Yasuo Iijima
- 👤 Makoto Kusano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:23
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/20; H01G4/22; H01G4/221; C; C08; C08F; C08F8/00; C08F8/30; C08F8/32; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/232; C10L1/233; C10L1/2335; C10L1/234; C10L1/238; C10L1/24; C10L1/2443; C10M; C10M1/00; C10M1/08; H01B; H01B19/00; H01B19/02; H01B3/00; H01B3/18; H01B3/20; H01B3/22; C10M2203/00; C10M2203/06; C10M2205/00; C10M2205/22; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/024; C10M2207/026; C10M2207/04; C10M2207/042; C10M2207/28; C10M2207/282; C10M2207/34; C10M2207/40; C10M2207/404; C10M2215/00; C10M2215/02; C10M2215/06; C10M2215/064; C10M2215/065; C10M2215/066; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/087; C10M2219/088; C10M2219/089; C10M2223/00; C10M2223/02; C10M2223/04; C10M2223/041; C10M2223/042; C10N; C10N2040/00; C10N2040/14; C10N2040/16; C10N2040/17
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
44 words
An oil impregnated electric device containing an element comprising at least one pair of electrodes and at least one sheet of polyolefin film, wherein said element is impregnated with a mixture comprising 1,1-phenylxylyl ethane and from 10- 80 volume % of an organic phosphate.
Claim 2
Dependent Claim
44 words
An oil impregnated electric device containing an element comprising at least one pair of electrodes and at least one sheet of polyolefin film, wherein said element is impregnated with a mixture comprising 1,1-phenylxylyl ethane and from 10- 80 volume % of an organic phosphate.
Claim 3
Dependent Claim
22 words
An oil impregnated electric device according to claim 1, wherein said mixture contains 20 - 70 volume % of the organic phosphate.
Claim 4
Dependent Claim
16 words
An oil impregnated electric device according to claim 1, wherein said polyolefin film is polypropylene film.
Claim 5
Dependent Claim
20 words
An oil impregnated electric device according to claim 1, wherein said phosphate has a dielectric constant of 4 - 8.
Claim 6
Dependent Claim
20 words
An oil impregnated electric device according to claim 1, wherein said phosphate is tricresyl phosphate, cresyldiphenyl phosphate, or trixylenyl phosphate.
Claim 7
Dependent Claim
23 words
An oil impregnated electric device according to claim 1, wherein the mixture additionally contains 0.05 - 5% by weight of an epoxy compound.
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) | 1980-10-10 | 1981-04-11 | 1981-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-10 | 1985-04-11 | 1985-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-10 | 1989-04-11 | 1989-10-11 | $7700.00 | Window Closed / Lapsed |