Patent US3769146A successfully refreshed from Google Patents.
US3769146A
Expired / Lapsed
US
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Light non-inflammable laminates
Assignee: Rhone Poulenc SA
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Filing: 1972-05-23
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Granted: 1973-10-30
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Expires: 1992-05-23
Abstract
Abstract Non-inflammable laminates which on combustion give only small and non-toxic amounts of fumes and gases have a thin metal foil facing on an asbestos paper support and a core of glass fibre fabric, polyamide-imide fibre fabric, or polyimide fibre fabric, optionally with an asbestos fabric, the whole being bonded together with an organosilicon polymer or polyimide.
Inventors
- 👤 J Ravel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:19
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/14; E; E04; E04B; E04B1/00; E04B1/62; E04B1/92; E04B1/94; E04B1/946; B32B5/00; B32B5/22; B32B5/24; B32B5/26; B32B7/00; B32B7/04; B32B7/12; B32B2262/00; B32B2262/02; B32B2262/0261; B32B2262/10; B32B2262/101; B32B2307/00; B32B2307/30; B32B2307/306; B32B2307/3065; B32B2307/70; B32B2307/718; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/266; Y10T428/31504; Y10T428/31652; Y10T428/31659; Y10T428/31721; Y10T442/00; Y10T442/60; Y10T442/654; Y10T442/656
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
20 words
A laminate according to claim 1 having on both faces a said metal foil facing with an asbestos paper support.
Claim 2
Dependent Claim
23 words
A laminate according to claim 1 in which the core comprises two layers of glass fibre fabric having an asbestos paper sandwiched therebetween.
Claim 3
Dependent Claim
28 words
A laminate according to claim 1 in which the core comprises three layers of glass fibre fabric alternating with two layers of asbestos felt reinforced with glass fibres.
Claim 4
Dependent Claim
18 words
A laminate according to claim 1 in which the core comprises two adjacent layers of glass fibre fabric.
Claim 5
Dependent Claim
19 words
A laminate according to claim 1 in which the core comprises three adjacent layers of a polyamide-imide fibre fabric.
Claim 6
Dependent Claim
13 words
A laminate according to claim 1 having a density not above 1.6 g/cm3.
Claim 7
Dependent Claim
17 words
A laminate according to claim 1 comprising 15 to 35 percent by weight of the said binder.
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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |