US3950470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the fabrication of sintered panels and panels resulting from the application of this process
Assignee: Coordination et Developpement de I'nnovation Cordi SA
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Filing: 1973-10-29
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Granted: 1976-04-13
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Expires: 1993-10-29
Abstract
Abstract The invention pertains to a panel manufacturing process comprising the steps of spreading in succession on a stationary or mobile support a layer of an alkaline silicate mixture, followed by a layer of an intimate mixture of mineral or organic particles and/or fibres and of an organic bonding agent and of simultaneously compressing these layers by bringing them up to a temperature of at least 80°C depending on the bonding agent used.
Inventors
- 👤 Joseph Davidovits
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:18
CPC Classifications
C; C04; C04B; C04B28/00; B; B32; B32B; B32B27/00; B32B27/12; B32B19/00; B32B19/04; B32B19/045; B32B19/08; B32B21/00; B32B21/04; B32B21/08; B32B27/06; B32B27/10; B32B27/14; B32B27/28; B32B27/40; B32B5/00; B32B5/02; B32B5/16; B32B7/00; B32B7/04; B32B7/12; B32B9/00; B32B9/002; B32B9/02; B32B9/04; B32B9/045; C04B28/001; E; E04; E04C; E04C2/00; E04C2/02; E04C2/26; E04C2/284; B32B2315/00; B32B2315/08; B32B2315/12; B32B2315/14; B32B2315/16; B32B2317/00; B32B2317/10; B32B2317/12; B32B2317/16; B32B2318/00; B32B2318/04; B32B2375/00; B32B2607/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
128 words
A panel manufacturing process characterized in that it consists substantially of spreading in succession on a stationary or mobile support a layer of an alkaline silicate mixture, said alkaline silicate mixture being formed by the mixture of a clay material and an alkaline lye selected from the group consisting of soda, lime and sodium carbonate; followed by a layer of a mixture of mineral particles selected from the group consisting of glass, rock wool, vermiculite, asbestos and expanded clay; or organic particles selected from the group consisting of wood fragments, sawdust, vegetable particles, flax, straw, paper, pasteboard, and organic fibers of, natural, or synthetic textile fibers; and of an organic thermosetting resin, and simultaneously compressing these layers and bring them up to a temperature of at least 80°C.
Claim 2
Dependent Claim
128 words
A panel manufacturing process characterized in that it consists substantially of spreading in succession on a stationary or mobile support a layer of an alkaline silicate mixture, said alkaline silicate mixture being formed by the mixture of a clay material and an alkaline lye selected from the group consisting of soda, lime and sodium carbonate; followed by a layer of a mixture of mineral particles selected from the group consisting of glass, rock wool, vermiculite, asbestos and expanded clay; or organic particles selected from the group consisting of wood fragments, sawdust, vegetable particles, flax, straw, paper, pasteboard, and organic fibers of, natural, or synthetic textile fibers; and of an organic thermosetting resin, and simultaneously compressing these layers and bring them up to a temperature of at least 80°C.
Claim 3
Dependent Claim
19 words
Process according to claim 1, characterized in that the stationary or mobile support takes the form of a cast.
Claim 4
Dependent Claim
22 words
Process according to claim 1, characterized in that the alkaline silicate mixture is formed by a mixture of clay material and sand.
Claim 5
Dependent Claim
21 words
Process according to claim 1, characterized in that to the alkaline silicate mixture are added particles of stones, bricks, or slates.
Claim 6
Dependent Claim
12 words
Process according to claim 1, wherein the thermo-setting resin is urea-formal resin.
Claim 7
Dependent Claim
22 words
Process according to claim 1, characterized in that the compression pressure is of the order of 5 to 150 kg/cm 2 .
References Cited (Backward Citations)
US3193440A
Cited
US3778281A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-13 | 1979-10-13 | 1980-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-13 | 1983-10-13 | 1984-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-13 | 1987-10-13 | 1988-04-13 | $7700.00 | Window Closed / Lapsed |