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Patent US3937664A successfully refreshed from Google Patents.
US3937664A
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Oil filled electrical device
Assignee: Nissin Electric Co Ltd
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Filing: 1974-03-25
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Granted: 1976-02-10
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Expires: 1994-03-25
Abstract
Abstract An oil-filled electrical device comprising a casing, an electrical device element in the casing and an insulating oil consisting essentially of one or more 2-diphenylalkylether having the structural formula of ##SPC1## Wherein R is the alkyl group expressed as C n H 2n +1 wherein R is 1≦n423.8.
Inventors
- 👤 Fumio Tanimoto
- 👤 Mineaki Nishimatsu
- 👤 Sadayoshi Mukai
- 👤 Kaname Ishida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:25
CPC Classifications
H; H01; H01B; H01B13/00; H01B13/30; H01B3/00; H01B3/18; H01B3/20; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/20; H01G4/22; H01G4/221; C; C10; C10M; C10M2207/00; C10M2207/04; C10N; C10N2040/00; C10N2040/14; C10N2040/16; C10N2040/17
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
47 words
An oil-filled electrical device comprising a casing, an electrical device element in said casing and an insulating oil consisting essentially of one or more 2-diphenylalkylethers having the structural formula of ##SPC15## wherein R is the alkyl group expressed as C n H 2n + 1 wherein 1≦n≦8.
Claim 2
Dependent Claim
47 words
An oil-filled electrical device comprising a casing, an electrical device element in said casing and an insulating oil consisting essentially of one or more 2-diphenylalkylethers having the structural formula of ##SPC15## wherein R is the alkyl group expressed as C n H 2n + 1 wherein 1≦n≦8.
Claim 3
Dependent Claim
20 words
The device of claim 1, wherein said insulating oil consists essentially of a mixture of a plurality of 2-diphenylalkylether compounds.
Claim 4
Dependent Claim
12 words
The device of claim 1, wherein said element is a condenser element.
Claim 5
Dependent Claim
12 words
The device of claim 1, wherein said element is a transformer element.
Claim 6
Dependent Claim
12 words
The device of claim 1, wherein said element is a cable element.
Claim 7
Dependent Claim
12 words
The device of claim 2, wherein said element is a condenser element.
Claim 8
Dependent Claim
12 words
The device of claim 2, wherein said element is a transformer element.
Claim 9
Dependent Claim
12 words
The device of claim 2, wherein said element is a cable element.
Claim 10
Dependent Claim
35 words
The device of claim 1, wherein said insulating oil consists essentially of a mixture of at least two of said 2-diphenylalkylethers, one of which is more than 30% of the total amount of said oil.
Claim 11
Dependent Claim
36 words
The device of claim 1, wherein said insulating oil consists essentially of a mixture of at least two of said 2-diphenylalkylethers, one of which is from 30 to 70% of the total amount of said oil.
References Cited (Backward Citations)
US3240817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-09 | 1979-08-11 | 1980-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-09 | 1983-08-11 | 1984-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-09 | 1987-08-11 | 1988-02-10 | $7700.00 | Window Closed / Lapsed |