Patent US3281959A successfully refreshed from Google Patents.
US4046938A
Expired / Lapsed
US
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Insulating material
Assignee: General Electric Co
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Filing: 1976-07-23
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Granted: 1977-09-06
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Expires: 1996-07-23
Abstract
Abstract Composite electrical insulating material is protected by at least one outer polymeric layer which dissolves in the bonding or impregnating resin at elevated temperatures, permitting ready handling of the relatively fragile insulating material, and by reason of dissolution when installed, permitting the ready further impregnation of the assembled insulation.
Inventors
- 👤 Kevork A. Torossian
- 👤 Leo S. Kohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:36
CPC Classifications
B; B32; B32B; B32B19/00; B32B19/04; B32B19/045; B32B27/00; B32B27/06; B32B27/36; B32B27/365; H; H01; H01B; H01B7/00; H01B7/17; H01B7/29; B32B2260/00; B32B2260/04; B32B2260/046; B32B2305/00; B32B2305/72; B32B2307/00; B32B2307/20; B32B2307/206; B32B2315/00; B32B2315/10; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/251; Y10T428/29; Y10T428/2911; Y10T428/31504; Y10T428/31507; Y10T428/31511; Y10T428/31515; Y10T428/31518; Y10T428/31525; Y10T428/31536; Y10T428/31551; Y10T428/31616; Y10T428/3162; Y10T428/31721; Y10T428/31786; Y10T442/00; Y10T442/30; Y10T442/3854
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
72 words
Composite electrical insulation comprising at least one layer of electrical insulating tape, said tape consisting essentially of (a) at least one electrical insulating layer, (b) thermosetting resin impregnant for (a) and adhering to at least one outer surface of (a) a protective polymer film which is soluble in said resin at the curing temperature of said resin, said polymer film being selected from the group consisting of polycarbonate, polysulfone and polyphenylene oxide.
Claim 2
Dependent Claim
72 words
Composite electrical insulation comprising at least one layer of electrical insulating tape, said tape consisting essentially of (a) at least one electrical insulating layer, (b) thermosetting resin impregnant for (a) and adhering to at least one outer surface of (a) a protective polymer film which is soluble in said resin at the curing temperature of said resin, said polymer film being selected from the group consisting of polycarbonate, polysulfone and polyphenylene oxide.
Claim 3
Dependent Claim
13 words
Electrical insulation as in claim 1 wherein said insulating layer comprises micaceous material.
Claim 4
Dependent Claim
17 words
Electrical insulation as in claim 2 wherein said insulation comprises additionally at least one glass fabric layer.
Claim 5
Dependent Claim
13 words
Electrical insulation as in claim 1 wherein said resin impregnant comprises epoxy resin.
Claim 6
Dependent Claim
6 words
The cured insulation of claim 1.
Claim 7
Dependent Claim
10 words
A structure insulated with the cured insulation of claim 5.
Claim 8
Dependent Claim
16 words
Electrical insulation as in claim 1 wherein said insulation contains additionally at least one supporting layer.
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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) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |