US4078959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curved laminate panels
Assignee: Dow Chemical Co
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Filing: 1976-02-13
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Granted: 1978-03-14
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Expires: 1996-02-13
Abstract
Abstract Curved sandwich panels having a plastic foam core are prepared by providing a flexibilized foam core, laminating inner and outer skins to the core. The outer skin is laminated to the core at locations other than where the panel will be curved, bending the panel to the desired shape and laminating the outer layer to the core.
Inventors
- 👤 Albert J. Palfey
- 👤 William P. Hovey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:43
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/046; B29; B29C; B29C67/00; B29C67/20; B32B15/20; B32B3/00; B32B3/02; B32B38/00; B32B38/18; B32B38/1866; B32B7/00; B32B7/04; E; E04; E04C; E04C2/00; E04C2/30; B32B38/16; B32B38/164; B32B2038/168; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0221; B32B2266/0228; B32B2607/00; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T156/1031; Y10T156/1043; Y10T156/1044; Y10T428/00; Y10T428/24; Y10T428/2419; Y10T428/24479; Y10T428/24496; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/24999
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
107 words
In a method for the preparation of a foamed cored sandwich panel having a curved portion therein, the steps of the method comprising affixing a first or inner facing sheet to a flexibilized foam plastic core, affixing a second or exterior facing sheet to the foam plastic core only in a region where it is desired not to bend the resultant panel, bending the core and first facing sheet to a desired configuration wherein the first facing sheet is disposed on the concave side of the bend, adhering any unadhered portion of the second facing sheet to the core in the bent region of the laminated panel.
Claim 2
Dependent Claim
107 words
In a method for the preparation of a foamed cored sandwich panel having a curved portion therein, the steps of the method comprising affixing a first or inner facing sheet to a flexibilized foam plastic core, affixing a second or exterior facing sheet to the foam plastic core only in a region where it is desired not to bend the resultant panel, bending the core and first facing sheet to a desired configuration wherein the first facing sheet is disposed on the concave side of the bend, adhering any unadhered portion of the second facing sheet to the core in the bent region of the laminated panel.
Claim 3
Dependent Claim
42 words
The method of claim 1 wherein a slip sheet is disposed between the core and the adjacent portion of the exterior facing sheet and removing the slip sheet prior to adhering the unadhered portion of the second facing sheet to the core.
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) | 1981-03-13 | 1981-09-12 | 1982-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-13 | 1985-09-12 | 1986-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-13 | 1989-09-12 | 1990-03-14 | $7700.00 | Window Closed / Lapsed |