Patent US4444821A successfully refreshed from Google Patents.
US4444821A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum thermal insulation panel
Assignee: General Electric Co
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Filing: 1982-11-01
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Granted: 1984-04-24
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Expires: 2002-11-01
Abstract
Abstract A vacuum thermal insulation panel comprises a pair of laminated plastic and aluminum sheets together with a plastic edge strip sealed to the edges of the sheets so as to define an evacuable volume in which a glass fiber mat is disposed. The insulation panel of the present invention takes advantage of the light-weight, low cost and low thermal conductivity of plastic materials to form an evacuable volume into which a glass fiber insulating mat is disposed for support of the panel which is evacuated to provide improved thermal insulation. Additionally, a gas permeation barrier is employed on the edge strip of the panel to minimize gas permeation at its edges. A metal foil layer provides gas permeation protection through the large surface areas of the sheets themselves.
Inventors
- 👤 James R. Young
- 👤 Raymond M. Schreck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:07
CPC Classifications
B; B29; B29C; B29C70/00; B32; B32B; B32B15/00; B32B15/04; B32B15/08; E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/76; E04B1/78; E04B1/80; E04B1/803; F; F17; F17C; F17C13/00; F17C13/001; B29K; B29K2309/00; B29K2309/08; B32B2315/00; B32B2315/08; B32B2315/085; F17C2203/00; F17C2203/03; F17C2203/0304; F17C2203/0358; F17C2203/0391; F17C2203/0395; Y; Y02; Y02A; Y02A30/00; Y02A30/24; Y02A30/242; Y02B; Y02B80/00; Y02B80/10; Y10; Y10S; Y10S428/00; Y10S428/92; Y10T; Y10T428/00; Y10T428/23; Y10T428/231; Y10T428/237; Y10T428/238; Y10T428/239; Y10T442/00; Y10T442/60; Y10T442/654; Y10T442/656; Y10T442/674
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
150 words
A thermal insulation panel comprising: a first panel wall comprising a laminated structure of plastic and metal foil, said metal foil layer at least 0.7 mils thick, said first wall being substantially impermeable to atmospheric gases; a second panel wall comprising a laminated structure of plastic and metal foil, said metal foil layer at least 0.7 mils thick, said second wall also being substantially impermeable to atmospheric gases, said first and second panel walls having approximately the same dimensions; a plastic edge strip without metal foil, sealably joined to each of said first and second panel walls along the edges of said walls, said edge strip possessing a gas permeation barrier coating, the space between said edge strip and said panel walls being evacuated; and an insulation material disposed within said volume and functioning to maintain such panel walls in a spaced apart relation under vacuum conditions within said volume.
Claim 2
Dependent Claim
150 words
A thermal insulation panel comprising: a first panel wall comprising a laminated structure of plastic and metal foil, said metal foil layer at least 0.7 mils thick, said first wall being substantially impermeable to atmospheric gases; a second panel wall comprising a laminated structure of plastic and metal foil, said metal foil layer at least 0.7 mils thick, said second wall also being substantially impermeable to atmospheric gases, said first and second panel walls having approximately the same dimensions; a plastic edge strip without metal foil, sealably joined to each of said first and second panel walls along the edges of said walls, said edge strip possessing a gas permeation barrier coating, the space between said edge strip and said panel walls being evacuated; and an insulation material disposed within said volume and functioning to maintain such panel walls in a spaced apart relation under vacuum conditions within said volume.
Claim 3
Dependent Claim
25 words
The insulation panel of claim 1 in which said first and second panel walls each comprise a layer of aluminum between two layers of plastic.
Claim 4
Dependent Claim
21 words
The insulation panel of claim 2 further including a gas permeation barrier disposed on exterior plastic layers of said panel walls.
Claim 5
Dependent Claim
18 words
The insulation panel of claim 1 further including gettering material for water vapor disposed within said evacuable volume.
Claim 6
Dependent Claim
12 words
The insulation panel of claim 1 further including gettering material comprising barium.
Claim 7
Dependent Claim
13 words
The insulation panel of claim 1 in which said metal foil comprises aluminum.
Claim 8
Dependent Claim
22 words
The insulation panel of claim 1 in which said plastic layers in said panel wall comprise a low gas permeation plastic material.
Claim 9
Dependent Claim
26 words
The insulation panel of claim 1 in which said first and second panel walls each comprise two layers of aluminum interleaved by three layers of plastic.
Claim 10
Dependent Claim
14 words
The insulation panel of claim 1 in which said insulation material comprises glass fibers.
References Cited (Backward Citations)
US2939811A
Cited
US3004877A
Cited
US3309844A
Cited
US3264165A
Cited
US3936553A
Cited
US4172915A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-24 | 1987-10-24 | 1988-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-24 | 1991-10-24 | 1992-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-24 | 1995-10-24 | 1996-04-24 | $7700.00 | Window Closed / Lapsed |