US4161855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal insulation material and process for making the same
Assignee: General Electric Co
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Filing: 1978-02-02
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Granted: 1979-07-24
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Expires: 1998-02-02
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. The material comprises an inorganic, low-density foam with gypsum as the major constiuent.
Inventors
- 👤 Robert F. Mulvey
- 👤 Charles E. Crepeau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:52
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/04; E04C2/043; E04C2/30; E04C2/38; E04C2/384
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
69 words
A thermally insulating composite assembly comprising generally at least one structural surface element and a low density cellular gypsum material positioned adjacent to said surface element, said cellular gypsum material comprising a gypsum matrix having minute cavities homogeneously distributed therein, said gypsum material having a dry density in the range of about 3 to about 6 pounds per cubic foot and a thermal coefficient of less than about 0.36.
Claim 2
Dependent Claim
69 words
A thermally insulating composite assembly comprising generally at least one structural surface element and a low density cellular gypsum material positioned adjacent to said surface element, said cellular gypsum material comprising a gypsum matrix having minute cavities homogeneously distributed therein, said gypsum material having a dry density in the range of about 3 to about 6 pounds per cubic foot and a thermal coefficient of less than about 0.36.
Claim 3
Dependent Claim
28 words
A composite assembly according to claim 1, wherein said gypsum matrix includes at least approximately 0.5 percent by weight of fibrous material dispersed homogeneously throughout said gypsum matrix.
Claim 4
Dependent Claim
24 words
A composite assembly according to claim 2, wherein said fibrous material is comprised of approximately 0.5 to 2 percent by weight of chopped glass.
Claim 5
Dependent Claim
37 words
A composite assembly according to claim 1, further comprising at least first and second studs positioned adjacent to said one structural surface element for containing said gypsum material therebetween, whereby to form a thermally insulated ceiling structure.
Claim 6
Dependent Claim
37 words
A composite assembly according to claim 1, further comprising a second structural surface element spaced parallel to said one structural surface element to hold said gypsum material therebetween, whereby to form a thermally insulated composite wall assembly.
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) | 1982-07-23 | 1983-01-22 | 1983-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-23 | 1987-01-22 | 1987-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-23 | 1991-01-22 | 1991-07-24 | $7700.00 | Window Closed / Lapsed |