US6143389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-insulating body
Assignee: Bayer AG
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Filing: 1995-10-26
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Granted: 2000-11-07
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Expires: 2015-10-26
Abstract
Abstract The invention concerns a heat-insulating body comprising: a) a pulverized hard foamed plastics material and optionally an inorganic porous material; and b) a foil enveloping component a). The foil enveloping component a) is evacuated and then hermetically sealed.
Inventors
- 👤 Karl Werner Dietrich
- 👤 Heinz Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:10
CPC Classifications
F; F16; F16L; F16L59/00; F16L59/06; F16L59/04; Y; Y10; Y10T; Y10T428/00; Y10T428/23; Y10T428/231; Y10T428/233; Y10T428/239
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
103 words
A heat insulating body comprising a) a rigid foamed plastic material comminuted to a powder and optionally an inorganic porous material, wherein said powder has a particle size of from 0.01 mm to 1 mm, and of b) a sheet which clads component a), wherein the foamed plastic material powder is pre-pressed at pressures of 0.5 to 5 bar and, prior to being clad with the sheet, has been freed from volatile constituents by heating at temperatures from 50 to 250° C. and, optionally, under a low pressure, and wherein the sheet which clads component a) has been evacuated and then hermetically sealed.
Claim 2
Dependent Claim
103 words
A heat insulating body comprising a) a rigid foamed plastic material comminuted to a powder and optionally an inorganic porous material, wherein said powder has a particle size of from 0.01 mm to 1 mm, and of b) a sheet which clads component a), wherein the foamed plastic material powder is pre-pressed at pressures of 0.5 to 5 bar and, prior to being clad with the sheet, has been freed from volatile constituents by heating at temperatures from 50 to 250° C. and, optionally, under a low pressure, and wherein the sheet which clads component a) has been evacuated and then hermetically sealed.
Claim 3
Dependent Claim
21 words
The heat-insulating body according to claim 1, wherein the foamed plastic material to be comminuted is a rigid polyurethane foamed material.
Claim 4
Dependent Claim
17 words
The heat-insulating body according to claim 1, wherein a multilayer sheet, is used as the cladding sheet.
Claim 5
Dependent Claim
15 words
The heat-insulating body according to claim 3, wherein said multilayer sheet is a polyethylene/aluminum sheet.
Claim 6
Dependent Claim
16 words
The heat-insulating body according to claim 3, wherein said multilayer sheet is a polyethylene/polyvinyl alcohol sheet.
Claim 7
Dependent Claim
17 words
The heat-insulating body according to claim 1, wherein porous silicates are used as the inorganic porous material.
Claim 8
Dependent Claim
16 words
The heat-insulating body according to claim 1, wherein said temperature ranges from 120 to 200° C.
Claim 9
Dependent Claim
16 words
The heat-insulating body according to claim 1, wherein said pressure ranges from 1 to 3 bar.
References Cited (Backward Citations)
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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) | 2003-11-07 | 2004-05-08 | 2004-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-11-07 | 2008-05-08 | 2008-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-11-07 | 2012-05-08 | 2012-11-07 | $7700.00 | Window Closed / Lapsed |