US3976526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of curved composite panel containing a rigid foamed plastic
Assignee: Dow Chemical Co
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Filing: 1974-09-16
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Granted: 1976-08-24
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Expires: 1994-09-16
Abstract
Abstract A curved panel is prepared by bending a rigid plastic foam such as polystyrene foam and simultaneously applying a rigid facing layer on the convex surface thereof.
Inventors
- 👤 William P. Hovey
- 👤 James J. Kubiak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:56
CPC Classifications
B; B32; B32B; B32B38/00; B32B38/18; B32B38/1866; B29; B29C; B29C53/00; B29C53/02; B29C53/04; B29C53/043; B32B15/00; B32B15/04; B32B15/046; B32B21/00; B32B21/04; B32B21/047; B29C63/00; B29C63/02; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0221; B32B2266/0228; B32B2305/00; B32B2305/02; B32B2305/022; B32B2311/00; B32B2311/24; B32B2317/00; B32B2317/16; B32B2325/00; B32B2607/00; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1028; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24496; Y10T428/24504; Y10T428/24512; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/249991; Y10T428/249992; Y10T428/249993; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31522; Y10T428/31551; Y10T428/31605; Y10T428/31678; Y10T428/31681; Y10T428/31692; Y10T428/31699; Y10T428/31971; Y10T428/31989
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
116 words
A method for the preparation of a curved composite laminated plastic foam-containing panel, the steps of the method comprising providing a rigid foam plastic body having at least a first generally planar major surface and a second generally planar major surface, the second surface having a first facing sheet adhered thereto, the first and second surfaces being generally parallel, bending the body to provide a body having a generally concave configuration of the first major surface, applying to the first major surface of the body and adhering to the body a second facing sheet, the second facing sheet being applied and adhered to the body at a location along a line where the body is bent.
Claim 2
Independent Claim
116 words
A method for the preparation of a curved composite laminated plastic foam-containing panel, the steps of the method comprising providing a rigid foam plastic body having at least a first generally planar major surface and a second generally planar major surface, the second surface having a first facing sheet adhered thereto, the first and second surfaces being generally parallel, bending the body to provide a body having a generally concave configuration of the first major surface, applying to the first major surface of the body and adhering to the body a second facing sheet, the second facing sheet being applied and adhered to the body at a location along a line where the body is bent.
Claim 3
Dependent Claim
19 words
The method of claim 1 wherein bending is accomplished by passing the body between spaced apart generally parallel rolls.
References Cited (Backward Citations)
GB563097A
Cited
US3012923A
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US3300839A
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US3389202A
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US3616123A
Cited
US3531348A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-24 | 1980-02-23 | 1980-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-24 | 1984-02-23 | 1984-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-24 | 1988-02-23 | 1988-08-24 | $7700.00 | Window Closed / Lapsed |