Patent US4055504A successfully refreshed from Google Patents.
US4055504A
Expired / Lapsed
US
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Stabilizer in a high voltage insulation on a polyolefin base
Assignee: Kabel Rheydt AG
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Filing: 1976-05-12
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Granted: 1977-10-25
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Expires: 1996-05-12
Abstract
Abstract A high voltage insulation polyolefin base is provided with a stabilizing amount of a wetting agent containing a perfluoro-alkyl group as a stabilizer to improve the voltage stability of the polyolefin base.
Inventors
- 👤 Heinz Heumann
- 👤 Manfred Saure
- 👤 Heinz Wagner
- 👤 Johann Wartusch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:49
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/20; H01B3/24; H01B3/30; H01B3/44; H01B3/441
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
38 words
A high voltage insulation polyolefin base having a stabilizing amount of a wetting agent as a stabilizer to improve the voltage stability of the polyolefin base, the wetting agent being a sulfonamide-ethylene oxide adduct having a perfluoro-alkyl group.
Claim 2
Dependent Claim
38 words
A high voltage insulation polyolefin base having a stabilizing amount of a wetting agent as a stabilizer to improve the voltage stability of the polyolefin base, the wetting agent being a sulfonamide-ethylene oxide adduct having a perfluoro-alkyl group.
Claim 3
Dependent Claim
18 words
The insulation as defined in claim 1 including a low viscosity, aromatic hydrocarbon mixture as a further stabilizer.
Claim 4
Dependent Claim
32 words
The insulation as defined in claim 1 wherein the polyolefin is a cross-linked polyethylene and includes a further stabilizer comprised of a mixture of aromatic ketone and an aromatic containing hydroxyl compound.
Claim 5
Dependent Claim
14 words
The insulation as defined in claim 1 wherein the polyolefin is a cross-linked polyethylene.
Claim 6
Dependent Claim
30 words
The insulation as defined in claim 1 wherein the perfluoro-alkyl group contains 1 to 10 carbon atoms, and the wetting agent contains 10 to 50 weight percent of such group.
Claim 7
Dependent Claim
22 words
The insulation as defined in claim 5 wherein the ethylene oxide component of the wetting agent comprises 10 to 60% by weight.
Claim 8
Dependent Claim
44 words
A process for stabilizing a high voltage insulation polyolefin base comprising adding a stabilizing amount of a wetting agent as a stabilizer to improve the voltage stability of the high voltage insulation, the wetting agent being a sulfonamide-ethylene oxide adduct having a perfluoro-alkyl group.
Claim 9
Dependent Claim
44 words
A process for stabilizing a high voltage insulation polyolefin base comprising adding a stabilizing amount of a wetting agent as a stabilizer to improve the voltage stability of the high voltage insulation, the wetting agent being a sulfonamide-ethylene oxide adduct having a perfluoro-alkyl group.
Claim 10
Dependent Claim
24 words
The process as defined in claim 7 wherein the wetting agent is combined with a low viscosity, aromatic hydrocarbon mixture as a further stabilizer.
Claim 11
Dependent Claim
33 words
The process as defined in claim 7 wherein the polyolefin is a cross-linked polyethylene and includes a further stabilizer comprised of a mixture of an aromatic ketone and an aromatic containing hydroxyl compound.
Claim 12
Dependent Claim
14 words
The process as defined in claim 7 wherein the polyolefin is a cross-linked polyethylene.
Claim 13
Dependent Claim
30 words
The process as defined in claim 7 wherein the perfluoro-alkyl group contains 1 to 10 carbon atoms, and the wetting agent contains 10 to 50 weight percent of such group.
Claim 14
Dependent Claim
22 words
The process as defined in claim 11 wherein the ethylene oxide component of the wetting agent comprises 10 to 60% by weight.
References Cited (Backward Citations)
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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) | 1980-10-24 | 1981-04-25 | 1981-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-24 | 1985-04-25 | 1985-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-24 | 1989-04-25 | 1989-10-25 | $7700.00 | Window Closed / Lapsed |