US4351867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal insulation composite of cellular cementitious material
Assignee: General Electric Co
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Filing: 1981-03-26
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Granted: 1982-09-28
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Expires: 2001-03-26
Abstract
Abstract An improved material particularly suited for the thermal insulation of building structures, such as residential housing, and a process for making the same, are disclosed. The thermally insulating composite comprises a low-density, cellular, fiber-containing, cementitious material and at least one structural surface element made of the cellular, fiber-containing, cementitious material, the structural surface element of which has a higher density than the low-density, cellular, fiber-containing, cementitious material from which it is formed therefrom and integral therewith. The thermally insulating composite is made by placing a foam of the low-density, cementitious material having entrapped gas therein, in an enclosure at least part of which is permeable to the gas and the liquid medium of the foam, and applying pressure to a surface of that enclosure to remove the gas and the liquid medium at the permeable enclosure.
Inventors
- 👤 Robert F. Mulvey
- 👤 Charles E. Crepeau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:22
CPC Classifications
C; C04; C04B; C04B38/00; C04B38/007; B; B28; B28B; B28B1/00; B28B1/50; Y; Y10; Y10T; Y10T428/00; Y10T428/23; Y10T428/232; Y10T428/233; Y10T428/249921; Y10T428/249953; Y10T428/249967; Y10T428/249968; Y10T428/249987; Y10T428/249988
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
55 words
A thermally insulating composite comprising: (a) a low-density cellular cementitious material containing fibrous material; and (b) at least one structural surface element of cellular cementitious material formed from, integrally with, and upon at least part of the low-density material, the structural surface element containing fibrous material and having a higher density than the low-density material.
Claim 2
Dependent Claim
55 words
A thermally insulating composite comprising: (a) a low-density cellular cementitious material containing fibrous material; and (b) at least one structural surface element of cellular cementitious material formed from, integrally with, and upon at least part of the low-density material, the structural surface element containing fibrous material and having a higher density than the low-density material.
Claim 3
Dependent Claim
28 words
The thermally insulating composite of claim 1 wherein the dry density of the low-density cellular cementitious material containing fibrous material is greater than about 6 lbs./ft. 3 .
Claim 4
Dependent Claim
31 words
The thermally insulating composite of claim 1 wherein the dry density of the low-density cellular cementitious material containing fibrous material is about 6 lbs./ft. 3 to about 35 lbs./ft. 3 .
Claim 5
Dependent Claim
27 words
The thermally insulating composite of claim 1 wherein the dry density of the structural surface element is about 50 lbs./ft. 3 to about 120 lbs./ft. 3 .
Claim 6
Dependent Claim
14 words
The thermally insulating composite of claim 1 wherein the cementitious material is hydraulic cement.
Claim 7
Dependent Claim
14 words
The thermally insulating composite of claim 5 wherein the hydraulic cement is Portland cement.
Claim 8
Dependent Claim
13 words
The thermally insulating composite of claim 1 wherein the cementitious material is gypsum.
Claim 9
Dependent Claim
17 words
The thermally insulating composite of claim 1 wherein the cellular portion of the cementitious material contains air.
Claim 10
Dependent Claim
31 words
The thermally insulating composite of claim 1 wherein the cementitious material contains about 0.25 weight percent to about 7.0 weight percent fibrous material based upon the weight of the cementitious material.
Claim 11
Dependent Claim
25 words
The thermally insulating composite of claim 1 wherein the fibrous material is selected from the group consisting of glass fibers, cellulose fibers and mineral wool.
Claim 12
Dependent Claim
33 words
The thermally insulating composite of claim 1 comprising a plurality of structural surfaces of the cellular cementitious material containing fibrous material, the plurality of surfaces defining a core of low-density cellular cementitious material.
Claim 13
Dependent Claim
19 words
The thermally insulating composite of claim 1 further comprising a permeable enclosure element upon the higher density structural surface.
Claim 14
Dependent Claim
17 words
The thermally insulating composite of claim 12 wherein the permeable enclosure element is woven or non-woven fabric.
Claim 15
Dependent Claim
25 words
The thermally insulating composite of claim 12 wherein the permeable enclosure element has a pore size of less than 40 mesh to about 100 mesh.
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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) | 1985-09-27 | 1986-03-29 | 1986-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-27 | 1990-03-29 | 1990-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-27 | 1994-03-29 | 1994-09-28 | $7700.00 | Window Closed / Lapsed |