US4745015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal insulating panel
Assignee: Dow Chemical Co
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Filing: 1983-04-18
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Granted: 1988-05-17
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Expires: 2003-04-18
Abstract
Abstract An improved vacuum panel of double wall construction comprising: (a) two walls of a structurally stable material containing at least one metal layer of at least 0.125 mm in thickness; (b) edges of a normally solid plastic material which have been rendered substantially impermeable to gases, said edges being affixed by means of an adhesive layer to the walls such that an evacuated space is enclosed between the walls of the panel, and (c) a gas-absorbing material residing in the evacuated space.
Inventors
- 👤 Chin H. Cheng
- 👤 Wilhelm E. Walles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:47
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B15/18; B32B27/00; B32B27/30; B32B27/304; B32B7/00; B32B7/04; B32B7/12; E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/76; E04B1/78; E04B1/80; E04B1/803; B32B2255/00; B32B2255/10; B32B2255/20; B32B2255/205; B32B2307/00; B32B2307/30; B32B2307/304; B32B2307/70; B32B2307/724; B32B2307/7242; B32B2311/00; B32B2311/30; B32B2327/00; B32B2607/00; F; F25; F25D; F25D2201/00; F25D2201/10; F25D2201/14; Y; Y02; Y02A; Y02A30/00; Y02A30/24; Y02A30/242; Y02B; Y02B80/00; Y02B80/10; Y10; Y10S; Y10S220/00; Y10S220/902; Y10S428/00; Y10S428/92; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1355; Y10T428/1359; Y10T428/1379; Y10T428/1383; Y10T428/23; Y10T428/231; Y10T428/237; Y10T428/238; Y10T428/239; Y10T428/26; Y10T428/31504; Y10T428/31678; Y10T428/31692
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
106 words
A thermal insulating panel having double wall construction exhibiting a permeance to oxygen of about no more than 0.1 cc per day per m 2 of surface area per atmosphere, said panel comprising: (a) two walls of a structurally stable material containing at least one metal layer of at least 0.125 mm in thickness; (b) edges of a normally solid plastic material which have been rendered substantially impermeable to gases, said edges being affixed by means of an adhesive layer to the walls such that an evacuated space is enclosed between the walls of the panel, and (c) a gas-absorbing material residing in the evacuated space.
Claim 2
Dependent Claim
106 words
A thermal insulating panel having double wall construction exhibiting a permeance to oxygen of about no more than 0.1 cc per day per m 2 of surface area per atmosphere, said panel comprising: (a) two walls of a structurally stable material containing at least one metal layer of at least 0.125 mm in thickness; (b) edges of a normally solid plastic material which have been rendered substantially impermeable to gases, said edges being affixed by means of an adhesive layer to the walls such that an evacuated space is enclosed between the walls of the panel, and (c) a gas-absorbing material residing in the evacuated space.
Claim 3
Dependent Claim
14 words
The panel of claim 1 wherein the evacuated space is filled with gas-absorbing material.
Claim 4
Dependent Claim
11 words
The panel of claim 1 wherein the metal-containing material is steel.
Claim 5
Dependent Claim
13 words
The panel of claim 1 wherein the metal-containing material is a metal/plastic/metal laminate.
Claim 6
Dependent Claim
45 words
The panel of claim 1 wherein the edges are rendered essentially impermeable to gases by a method which comprises applying to at least one surface thereof a layer of a barrier polymer and overcoating said layer of barrier polymer with an adherent layer of metal.
Claim 7
Dependent Claim
23 words
The panel of claim 5 wherein the metal layer is overcoated with a layer of a barrier polymer adherent to the metal layer.
Claim 8
Dependent Claim
17 words
The panel of claim 5 wherein the barrier polymer is overcoated with an adherent layer of silver.
Claim 9
Dependent Claim
14 words
The panel of claim 5 wherein the barrier polymer is a vinylidene chloride copolymer.
Claim 10
Dependent Claim
42 words
The panel of claim 1 wherein the edges are rendered essentially impermeable to gases by a method which comprises applying to at least one surface thereof a layer of metal and overcoating said metal layer with a layer of a barrier polymer.
Claim 11
Dependent Claim
19 words
The panel of claim 1 wherein the gas-absorbing material comprises activated charcoal in the form of a particulate solid.
Claim 12
Dependent Claim
26 words
The panel of claim 1 wherein at least a portion of the gas-absorbing material is an alkali metal alkoxide having from 2 to 12 carbon atoms.
Claim 13
Dependent Claim
19 words
The panel of claim 1 wherein the gas-absorbing material is fumed silica in the form of a particulate solid.
Claim 14
Dependent Claim
18 words
The panel of claim 1 which exhibits a permeance to oxygen of less than 0.06 cc/day/m 2 /atm.
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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) | 1991-05-17 | 1991-11-16 | 1992-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-17 | 1995-11-16 | 1996-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-17 | 1999-11-16 | 2000-05-17 | $7700.00 | Window Closed / Lapsed |