US4368604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulating panel for roof coverings
Assignee: Dynamit Nobel AG
•
Filing: 1981-04-02
•
Granted: 1983-01-18
•
Expires: 2001-04-02
Abstract
Abstract An insulating panel suitable for the covering of roof structures includes a core layer of a synthetic foam material bonded adhesively on its top side to a sealing thermoplastic layer. The core layer is formed of an elastic closed-cell crosslinked polyolefin foamed material.
Inventors
- 👤 Paul Spielau
- 👤 Peter Putz
- 👤 Richard Weiss
- 👤 Hansfritz Schraube, deceased
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:52
CPC Classifications
E; E04; E04D; E04D3/00; E04D3/35; E04D3/351; E04D3/354; E04D13/00; E04D13/16; E04D13/1606; E04D13/1662; E04D3/38; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249976; Y10T428/249977; Y10T428/249981
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
86 words
An insulating panel comprising a core layer of a synthetic foam material bonded adhesively on its topside to a sealing thermoplastic layer or sheet throughout the surface area of the topside for the covering of roof structures, said core layer comprising at least two superimposed foam sheets of an elastic, closed-cell crosslinked polyolefin foam material, said sheets being bonded together throughout the contacting surface areas by flame laminating, the bonding surfaces of the foam, initially melted by the flame laminating, together constituting a homogeneous polyolefin layer.
Claim 2
Dependent Claim
86 words
An insulating panel comprising a core layer of a synthetic foam material bonded adhesively on its topside to a sealing thermoplastic layer or sheet throughout the surface area of the topside for the covering of roof structures, said core layer comprising at least two superimposed foam sheets of an elastic, closed-cell crosslinked polyolefin foam material, said sheets being bonded together throughout the contacting surface areas by flame laminating, the bonding surfaces of the foam, initially melted by the flame laminating, together constituting a homogeneous polyolefin layer.
Claim 3
Dependent Claim
31 words
An insulating panel according to claim 1, wherein the foam layers are bonded together in a diagonally offset fashion with the formation of rabbet edges extending respectively along two adjoining sides.
Claim 4
Dependent Claim
31 words
An insulating panel according to claim 2, wherein a sealing means, comprising bilaterally adhesive strip, is arranged on a rabbet in the plane of the bonding surfaces of the foam sheets.
Claim 5
Dependent Claim
28 words
An insulating panel according to claim 1, wherein the polyolefin foam material is a crosslinked polyolefin foam having a weight per unit volume of 20-50 kg./m 3 .
Claim 6
Dependent Claim
26 words
An insulating panel according to claim 1, wherein the core layer is adhesively bonded to synthetic resin sheet material formed of soft PVC or ethylene-propylene-diene elastomer.
Claim 7
Dependent Claim
28 words
An insulating panel according to claim 1, wherein the homogeneous polyolefin layer is a compressed layer that forms a sealing surface layer between the two superimposed foam sheets.
Claim 8
Dependent Claim
15 words
An insulating panel according to claim 1, wherein the crosslinked polyolefin foam material comprises polyethylene.
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) | 1986-01-17 | 1986-07-19 | 1987-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-17 | 1990-07-19 | 1991-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-17 | 1994-07-19 | 1995-01-18 | $7700.00 | Window Closed / Lapsed |