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US4572861A
Expired / Lapsed
US
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Prefabricated element for use in particular in the building industry and a method of manufacture of said prefabricated element
Assignee: CONSULTORA SIDES CA CALLE CARABOBO EDIFICIO MARYSTELLA OFICINA 1-B EL ROSAL CARACAS 1060 VENEZUELA
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Filing: 1984-06-12
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Granted: 1986-02-25
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Expires: 2004-06-12
Abstract
Abstract The prefabricated element comprises a plurality of parallel layers which adhere to each other. A first layer (2) of low-density mortar contains a sheet (5) of woven mineral fibers extending parallel to and close to the internal surface. An intermediate layer (3) has exactly the same composition as the first layer but is filled with particles (7) of low-density heat-insulating material and also contains a sheet (6) of woven mineral fibers. A last layer (4) has exactly the same composition as the first layer but does not contain a sheet of woven mineral fibers.
Inventors
- 👤 Manuel Barretto Garcia
- 👤 Aurora Zapata Oviedo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:13
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/26; E04C2/284; E04C2/288; B; B28; B28B; B28B1/00; B28B1/14; B28B1/16; B28B1/52; B28B1/522; E04C2/04; E04C2/043; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/24994; Y10T428/249942; Y10T428/249946; Y10T428/25; Y10T428/254; Y10T428/27; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
214 words
A prefabricated element (1, 8, 18) which is primarily intended for the building industry and is composed of a plurality of parallel layers bonded to each other, wherein said element comprises: a first layer (2, 9, 19) of low-density mortar in which a sheet (5, 16, 22) of woven mineral fibers extends in substantially parallel relation to and in proximity to the internal surface of said layer; at least one intermediate layer (3, 11, 21) having a composition which is identical with that of the first layer but is additionally filled with particles (7) of low-density heat-insulating material, said intermediate layer being provided in the same manner as the first layer (2, 9, 19) with a sheet (6, 17, 23) of woven mineral fibers extending in substantially parallel relation to and in proximity to the intermediate-layer surface which is remote from said first layer; a last layer (4, 10, 20) which is identical in composition with the first layer but does not contain a sheet of woven mineral fibers, the first layer (2, 9, 19) and the last layer (4, 10, 20) having the following composition by weight: gypsum: 38 to 54% lime: 4 to 15% cement: 2.5 to 6% quarta dust: 2 to 5% organic resin: 0.7 to 3.5% water: 28 to 40%.
Claim 2
Dependent Claim
214 words
A prefabricated element (1, 8, 18) which is primarily intended for the building industry and is composed of a plurality of parallel layers bonded to each other, wherein said element comprises: a first layer (2, 9, 19) of low-density mortar in which a sheet (5, 16, 22) of woven mineral fibers extends in substantially parallel relation to and in proximity to the internal surface of said layer; at least one intermediate layer (3, 11, 21) having a composition which is identical with that of the first layer but is additionally filled with particles (7) of low-density heat-insulating material, said intermediate layer being provided in the same manner as the first layer (2, 9, 19) with a sheet (6, 17, 23) of woven mineral fibers extending in substantially parallel relation to and in proximity to the intermediate-layer surface which is remote from said first layer; a last layer (4, 10, 20) which is identical in composition with the first layer but does not contain a sheet of woven mineral fibers, the first layer (2, 9, 19) and the last layer (4, 10, 20) having the following composition by weight: gypsum: 38 to 54% lime: 4 to 15% cement: 2.5 to 6% quarta dust: 2 to 5% organic resin: 0.7 to 3.5% water: 28 to 40%.
Claim 3
Dependent Claim
24 words
An element according to claim 1, wherein the sheet (5, 6, 16, 17, 22, 23) of woven mineral fibers is a glass textile fabric.
Claim 4
Dependent Claim
21 words
An element according to claim 1, wherein the particles (7) of heat-insulating material of the intermediate layer are of expanded polystyrene.
Claim 5
Dependent Claim
33 words
An element according to claim 1, wherein said element comprises a plurality of superposed intermediate layers (11, 12, 13, 14, 15) having identical compositions and separated by sheets (17) of woven mineral fibers.
Claim 6
Dependent Claim
27 words
An element according to claim 1, wherein the different layers are formed by means of a mixture of gypsum, lime, cement, quartz dust, organic resin and water.
Claim 7
Dependent Claim
29 words
An element accordinig to claim 1, wherein the intermediate layer or layers (3, 11 to 15, 21) contain between 0.5 and 0.9% by weight of expanded polystyrene particles (7).
Claim 8
Dependent Claim
36 words
An element according to claim 5, wherein the layers further contain up to 0.5% by weight of an agent for retarding the setting time of gypsum, this retardant being selected from acetic acid and methylhydroxyethyl cellulose.
Claim 9
Dependent Claim
25 words
An element according to claim 1, wherein the specific weight of said element is within the range of 450 to 1200 kilograms per cubic meter.
Claim 10
Independent Claim
207 words
A method of manufacture of a prefabricated element which is primarily intended for use in the building industry, comprising bonding together the following layers: a first layer (2, 9, 19) of low-density mortar in which a sheet (5, 16, 22) of woven mineral fibers extends in substantially parallel relation to and in proximity to the internal surface of said layer; at least one intermediate layer (3, 11, 21) having a composition which is identical with that of the first layer but is additionally filled with particles (7) of low-density heat-insulating material, said intermediate layer being provided in the same manner as the first layer (2, 9, 19) with a sheet (6, 17, 23) of woven mineral fibers extending in substantially parallel relation to and in proximity to the intermediate-layer surface which is remote from said first layer; a last layer (4, 10, 20) which is identical in composition with the first layer but does not contain a sheet of woven mineral fibers, the first layer (2, 9, 19) and the last layer (4, 10, 20) having the following composition by weight: gypsum: 38 to 54% lime: 4 to 15% cement: 2.5 to 6% quartz dust: 2 to 5% organic resin: 0.7 to 3.5% water: 28 to 40%.
Claim 11
Independent Claim
207 words
A method of manufacture of a prefabricated element which is primarily intended for use in the building industry, comprising bonding together the following layers: a first layer (2, 9, 19) of low-density mortar in which a sheet (5, 16, 22) of woven mineral fibers extends in substantially parallel relation to and in proximity to the internal surface of said layer; at least one intermediate layer (3, 11, 21) having a composition which is identical with that of the first layer but is additionally filled with particles (7) of low-density heat-insulating material, said intermediate layer being provided in the same manner as the first layer (2, 9, 19) with a sheet (6, 17, 23) of woven mineral fibers extending in substantially parallel relation to and in proximity to the intermediate-layer surface which is remote from said first layer; a last layer (4, 10, 20) which is identical in composition with the first layer but does not contain a sheet of woven mineral fibers, the first layer (2, 9, 19) and the last layer (4, 10, 20) having the following composition by weight: gypsum: 38 to 54% lime: 4 to 15% cement: 2.5 to 6% quartz dust: 2 to 5% organic resin: 0.7 to 3.5% water: 28 to 40%.
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) | 1989-02-24 | 1989-08-26 | 1990-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-24 | 1993-08-26 | 1994-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-24 | 1997-08-26 | 1998-02-25 | $7700.00 | Window Closed / Lapsed |