US4190682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for impregnating a capacitor with a non-halogenated impregnant
Assignee: General Electric Co
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Filing: 1978-10-10
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Granted: 1980-02-26
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Expires: 1998-10-10
Abstract
Abstract A process for impregnating capacitors with a gas absorbing impregnant is disclosed including the steps of purefying a phthalate ester by adsorptive filtration and adding 5 to 30% by volume of an alkene having from 10 to less than 20 carbon atoms and 0.1 to 10% by volume of an epoxy stabilizer to the phthalate ester prior to impregnating the capacitor.
Inventors
- 👤 David G. Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:33
CPC Classifications
H; H01; H01G; H01G4/00; H01G4/002; H01G4/018; H01G4/20; H01G4/22; H01G4/221
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
83 words
In a process for impregnating capacitors with a gas absorbing impregnant including the steps of purifying a phthalate ester impregnant by adsorptive filtering said impregnant to remove impurities and impregnating the capacitor with the purified impregnant, the improvement comprising the additional step of adding 5 to 30% by volume of an alkene having from 10 to less than about 20 carbon atoms and 0.1 to 10% by volume of an epoxide stabilizer to said purified phthalate ester impregnant prior to impregnating the capacitor.
Claim 2
Dependent Claim
83 words
In a process for impregnating capacitors with a gas absorbing impregnant including the steps of purifying a phthalate ester impregnant by adsorptive filtering said impregnant to remove impurities and impregnating the capacitor with the purified impregnant, the improvement comprising the additional step of adding 5 to 30% by volume of an alkene having from 10 to less than about 20 carbon atoms and 0.1 to 10% by volume of an epoxide stabilizer to said purified phthalate ester impregnant prior to impregnating the capacitor.
Claim 3
Dependent Claim
27 words
The method of claim 1, wherein said alkene is decene, said epoxide stabilizer is a diglycidyl ether of Bisphenol A and said phthalate ester is dioctyl phthalate.
Claim 4
Dependent Claim
27 words
The method of claim 1, wherein said alkene is hexadecene, said epoxide stabilizer is a diglycidyl ether of Bisphenol A and said phthalate ester is dioctyl phthalate.
Claim 5
Dependent Claim
27 words
The method of claim 1, wherein said alkene is tetradecene, said epoxide stabilizer is a diglycidyl ether of Bisphenol A, and said phthalate ester is dioctyl phthalate.
Claim 6
Dependent Claim
17 words
The method of claim 1, wherein the additional step includes adding an effective amount of an antioxidant.
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) | 1983-02-25 | 1983-08-27 | 1984-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-25 | 1987-08-27 | 1988-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-25 | 1991-08-27 | 1992-02-26 | $7700.00 | Window Closed / Lapsed |