Patent US4794342A successfully refreshed from Google Patents.
US4366203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foamed plastics laminates
Assignee: Imperial Chemical Industries Ltd
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Filing: 1981-06-11
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Granted: 1982-12-28
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Expires: 2001-06-11
Abstract
Abstract Laminated foamed plastics articles, especially polyurethane and polyisocyanurate rigid foam panels, are faced with a composite layer of vermiculite lamellae and metal foil, especially aluminum foil. The vermiculite lamellae are preferably size-graded to below 50 microns and form a coating on the metal foil which has a thickness preferably below 50 microns. The laminated articles have good fire resistance properties.
Inventors
- 👤 Peter J. Briggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:07
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/18; B32B19/00; B32B19/02; B32B15/00; B32B15/04; B32B15/046; B32B15/20; B32B19/04; B32B19/041; B32B19/047; B32B29/00; B32B29/002; B32B29/007; E; E04; E04B; E04B1/00; E04B1/62; E04B1/92; E04B1/94; B32B2264/00; B32B2264/10; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0278; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/24999; Y10T428/25; Y10T428/256; Y10T428/257; Y10T428/259
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
25 words
A laminated article having a rigid foam plastics core covered, at least in part, with a composite layer of vermiculite lamellae and a metal foil.
Claim 2
Dependent Claim
25 words
A laminated article having a rigid foam plastics core covered, at least in part, with a composite layer of vermiculite lamellae and a metal foil.
Claim 3
Dependent Claim
19 words
An article according to claim 1 in which the plastics core is made of rigid polyurethane or polyisocyanurate foam.
Claim 4
Dependent Claim
20 words
An article according to claim 1 in which the vermiculite lamellae have a particle size of less than 50 microns.
Claim 5
Dependent Claim
14 words
An article according to claim 1 in which the metal foil is aluminium foil.
Claim 6
Dependent Claim
47 words
An article according to claim 1 in which the composite layer comprises a metal foil coated with a continuous layer of vermiculite lamellae and is bonded to the foam core such that the layer of vermiculite lamellae is sandwiched between the metal foil and the foam core.
Claim 7
Dependent Claim
21 words
An article according to claim 5 in which the layer of vermiculite lamellae has a thickness of less than 50 microns.
Claim 8
Dependent Claim
33 words
A process for the manufacture of laminated article having a rigid foam core which comprises covering the core, at least in part, with a composite layer of vermiculite lamellae and a metal foil.
Claim 9
Dependent Claim
33 words
A process for the manufacture of laminated article having a rigid foam core which comprises covering the core, at least in part, with a composite layer of vermiculite lamellae and a metal foil.
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) | 1985-12-27 | 1986-06-28 | 1986-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-27 | 1990-06-28 | 1990-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-27 | 1994-06-28 | 1994-12-28 | $7700.00 | Window Closed / Lapsed |