US4798753A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulating panels containing insulating powders and insulating gases
Assignee: General Electric Co
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Filing: 1988-02-11
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Granted: 1989-01-17
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Expires: 2008-02-11
Abstract
Abstract Insulating panels are formed from compressed particulate material impregnated with insulating gases, the combination being held in a gas tight pouch. These pouches can be placed in the insulation space of a structure where insulation is to be provided and, if desired, encapsulated in a foamed insulating material. Among the possible particulate materials is precipitated silica, while various Freon gases can be employed as the insulating gas.
Inventors
- 👤 Nesim Abuaf
- 👤 Robert W. Barito
- 👤 Kenneth L. Downs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:12
CPC Classifications
F; F25; F25D; F25D23/00; F25D23/06; C; C04; C04B; C04B30/00; E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/76; E04B1/78; E04B1/80; E04B1/806; F25D2201/00; F25D2201/10; F25D2201/12; F25D2201/122; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91; Y10; Y10T; Y10T428/00; Y10T428/23; Y10T428/231; Y10T428/239
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
94 words
A slab of material for use as a thermal insulation comprising: a. a compressed, particulate insulating material selected from the group consisting of precipitated silica, mixtures of precipitated silica and fly ash materials, said precipitated silica formed by the interaction of an alkaline water glass and a mineral acid to precipitate silica, followed by a drying action to form a dried, finely divided silica; b. a gas and water tight envelope surrounding said particulate insulating material; and c. an insulating gas within said gas and water tight envelope, said gas impregnating said particulate material.
Claim 2
Dependent Claim
94 words
A slab of material for use as a thermal insulation comprising: a. a compressed, particulate insulating material selected from the group consisting of precipitated silica, mixtures of precipitated silica and fly ash materials, said precipitated silica formed by the interaction of an alkaline water glass and a mineral acid to precipitate silica, followed by a drying action to form a dried, finely divided silica; b. a gas and water tight envelope surrounding said particulate insulating material; and c. an insulating gas within said gas and water tight envelope, said gas impregnating said particulate material.
Claim 3
Dependent Claim
22 words
The material of claim 1 wherein the insulating gas is a gas which has a heat conductivity lower than that of air.
Claim 4
Dependent Claim
21 words
The material of claim 2 wherein the heat insulating gas is selected from the group consisting of krypton, xenon, and freon.
Claim 5
Dependent Claim
19 words
The material of claim 1 wherein the pressure within the gas and water impermeable envelope is up to atmospheric.
Claim 6
Dependent Claim
17 words
The material of claim 4 wherein the pressure is from 10 mm. Hg to 100 mm. Hg.
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) | 1992-01-17 | 1992-07-18 | 1993-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-17 | 1996-07-18 | 1997-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-17 | 2000-07-18 | 2001-01-17 | $7700.00 | Window Closed / Lapsed |