Patent US4290926A successfully refreshed from Google Patents.
US4290926A
Expired / Lapsed
US
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Non-halogenated impregnant for capacitors comprising an aromatic carboxylic acid ester and an alkene
Assignee: General Electric Co
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Filing: 1978-06-19
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Granted: 1981-09-22
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Expires: 1998-06-19
Abstract
Abstract An electrical capacitor is impregnated with a base impregnant of a non-halogenated aromatic liquid which absorbs gas in the range of 40 DEG to 100 DEG to which is added a material that is a greater gas absorber over the same temperature range.
Inventors
- 👤 David G. Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:24
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/20; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/20; H01G4/22; H01G4/221; C; C10; C10M; C10M2203/00; C10M2203/02; C10M2203/022; C10M2203/024; C10M2203/04; C10M2207/00; C10M2207/02; C10M2207/023; C10M2207/026; C10M2207/04; C10M2207/042; C10M2207/08; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/34; C10N; C10N2040/00; C10N2040/14; C10N2040/16; C10N2040/17
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
88 words
A composition for use as a dielectric liquid under stress in an electrical apparatus comprising a. a dielectric liquid aromatic carboxylic ester which is hydrogen gas absorbing at a temperature between 40° and 100° C., and b. 5 to 30 percent by volume of an alpha unsaturated alkene normally liquid at room temperature dissolved therein, said alkene containing from 10 to less than 20 carbon atoms and having a significantly higher hydrogen gas absorbing value than the dielectric liquid aromatic ester, c. said composition being essentially halogen free.
Claim 2
Dependent Claim
88 words
A composition for use as a dielectric liquid under stress in an electrical apparatus comprising a. a dielectric liquid aromatic carboxylic ester which is hydrogen gas absorbing at a temperature between 40° and 100° C., and b. 5 to 30 percent by volume of an alpha unsaturated alkene normally liquid at room temperature dissolved therein, said alkene containing from 10 to less than 20 carbon atoms and having a significantly higher hydrogen gas absorbing value than the dielectric liquid aromatic ester, c. said composition being essentially halogen free.
Claim 3
Dependent Claim
11 words
The composition of claim 1, wherein said ester is a phthalate.
Claim 4
Dependent Claim
10 words
The composition of claim 2, containing additionally an epoxy stabilizer.
Claim 5
Dependent Claim
16 words
The composition of claim 3, wherein said epoxy stabilizer is a diglycidyl ether of Bisphenol A.
Claim 6
Dependent Claim
32 words
The composition of claim 3, which consists essentially of 5 to 30% by volume of the alkene, 0.1 to 10% by volume of the epoxide stabilizer and the remainder the phthalate ester.
Claim 7
Dependent Claim
16 words
The composition of claim 5, wherein said composition additionally contains an effective amount of an antioxidant.
Claim 8
Dependent Claim
23 words
The composition of claim 5, wherein said alkene is a member selected from the group consisting of decene, dodecene, tetradecene, hexadecene and octadecene.
Claim 9
Dependent Claim
27 words
The composition of claim 7, wherein said alkene is decene, said epoxy stabilizer is a diglycidyl ether of Bisphenol A and said phthalate ester is dioctyl phthalate.
Claim 10
Dependent Claim
27 words
The composition of claim 6, wherein said alkene is hexadecene, said epoxy stabilizer is a diglycidyl ether of Bisphenol A and said phthalate ester is dioctyl phthalate.
Claim 11
Dependent Claim
27 words
The composition of claim 7, wherein said alkene is tetradecene, said epoxy stabilizer is a diglycidyl ether of Bisphenol A and said phthalate ester is dioctyl phthalate.
Claim 12
Dependent Claim
101 words
A dielectric liquid composition for use as a dielectric liquid under electrical stress conditions comprising in combination a. a dielectric liquid carboxylic acid ester medium which is hydrogen gas absorbing between 40° C. and 100° C. b. an olefinic material having only aliphatic components dissolved in said dielectric liquid medium c. said olefinic material constituting greater than about 5% by volume of said dielectric liquid medium d. said olefinic material having a gas absorptivity value under electrical stress and in the presence of hydrogen of at least about 10 microliters per minute higher than that of said medium under similar conditions.
Claim 13
Dependent Claim
101 words
A dielectric liquid composition for use as a dielectric liquid under electrical stress conditions comprising in combination a. a dielectric liquid carboxylic acid ester medium which is hydrogen gas absorbing between 40° C. and 100° C. b. an olefinic material having only aliphatic components dissolved in said dielectric liquid medium c. said olefinic material constituting greater than about 5% by volume of said dielectric liquid medium d. said olefinic material having a gas absorptivity value under electrical stress and in the presence of hydrogen of at least about 10 microliters per minute higher than that of said medium under similar conditions.
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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) | 1984-09-21 | 1985-03-23 | 1985-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-21 | 1989-03-23 | 1989-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-21 | 1993-03-23 | 1993-09-22 | $7700.00 | Window Closed / Lapsed |