US3811005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glass-mica composite structure containing dephenyl oxide b-stage resin
Assignee: Westinghouse Electric Corp
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Filing: 1972-02-23
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Granted: 1974-05-14
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Expires: 1992-02-23
Abstract
Abstract A composite structure is disclosed which comprises a layer of glass cloth and a layer of mica paper impregnated and bonded together with a B-stage dephenyl oxide resin composition. The structure may be in the form of a tape or of a sheet and is used as insulation over electrical conductors. The dephenyl oxide composition preferably comprises a mixture of methoxy methyl diphenyl oxide and chloromethyl diphenyl oxide and a curing catalyst of finely divided silica containing a small amount of iron metal.
Inventors
- 👤 E Traynor
- 👤 D Rogers
- 👤 F Trunzo
- 👤 G Sprengling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:56
CPC Classifications
B; B32; B32B; B32B19/00; B32B19/06; H; H01; H01B; H01B3/00; H01B3/002; B32B5/00; B32B5/02; B32B5/024; H01B3/02; H01B3/04; H01B3/08; H01B3/084; B32B2260/00; B32B2260/02; B32B2260/021; B32B2260/04; B32B2260/046; B32B2315/00; B32B2315/08; B32B2315/085; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/251; Y10T428/26; Y10T428/29; Y10T428/2913; Y10T442/00; Y10T442/30; Y10T442/3927; Y10T442/3935
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
13 words
A composite structure according to claim 1 in the form of a tape.
Claim 2
Dependent Claim
13 words
A composite structure according to claim 1 in the form of a sheet.
Claim 3
Dependent Claim
29 words
A composite strUcture according to claim 1 wherein said glass cloth is directional and the warp direction to fill direction of ratio of yarn is up to about 9.
Claim 4
Dependent Claim
21 words
A composite structure according to claim 1 wherein said layer of glass cloth is about 1 to about 3 mils thick.
Claim 5
Dependent Claim
21 words
A composite structure according to claim 1 wherein said layer of mica paper is about 2 to about 6 mils thick.
Claim 6
Dependent Claim
22 words
A composite structure according to claim 1 wherein said diphenyl oxide composition is about 20 to about 30 percent of said structure.
Claim 7
Dependent Claim
26 words
A composite structure according to claim 1 wherein the average size of the mica flakes in the mica paper is about 20 to about 80 mils.
Claim 8
Dependent Claim
20 words
A composite structure according to claim 1 wherein said diphenyl oxide composition comprises (A) a compound having the general formula:
Claim 9
Dependent Claim
59 words
A composite structure according to claim 9 wherein said compound is a mixture of about 90 to about 99% methoxymethyl diphenyl oxide and about 1 to about 10% chloromethyl diphenyl oxide and said catalyst is about 4 to about 10% finely divided silica containing less than about 0.01% (based on said diphenyl oxide compound) iron stated as ferric chloride.
Claim 10
Dependent Claim
13 words
A composite structure according to claim 1 wrapped around a conductor and cured.
Claim 11
Dependent Claim
21 words
A composite structure according to claim 1 wherein said B-stage diphenyl oxide resin composition has up to an ''''L'''' Gardener viscosity.
Claim 12
Dependent Claim
28 words
A composite structure according to claim 9 wherein said curing catalyst is selected from the group consisting of boron trifluoride, aluminum chloride, tin tetrachloride, ferric chloride, and silica.
Claim 13
Dependent Claim
56 words
An insulated electrical member comprising A. at least one electrical conductor; B. a film containing a polyimide resin wrapped around said electrical conductor; and C. a flexible composite structure which comprises a layer of woven glass cloth and a layer of mica paper, each layer impregnated and bonded together with a B-staged diphenyl oxide resin composition.
Claim 14
Dependent Claim
17 words
An insulated electrical member according to claim 14 wherein said composite structure is in a cured state.
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) | 1977-05-13 | 1977-11-12 | 1978-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-13 | 1981-11-12 | 1982-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-13 | 1985-11-12 | 1986-05-14 | $7700.00 | Window Closed / Lapsed |