US3732138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Panel constructions
Assignee: Individual
•
Filing: 1971-03-31
•
Granted: 1973-05-08
•
Expires: 1991-03-31
Abstract
Abstract A panel characterized in that at least one of its external faces, i.e., the one under compression stresses when the panel is loaded, is made of a lamination including an outer layer bonded to an inner layer by an intermediate layer of rigid plastic foam. The thickness of the rigid plastic foam layer is many times the thickness of each of the said outer and inner layers, and the thickness of the complete panel is many times the thickness of the lamination. The panel further includes strengthening ribs extending longitudinally between the lamination and the other external face of the panel.
Inventors
- 👤 E Almog
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:27
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/02; E04C2/10; E04C2/20; E04C2/205; B; B32; B32B; B32B15/00; B32B15/04; B32B15/046; B32B15/14; B32B3/00; B32B3/10; B32B3/12; B32B5/00; B32B5/18; E04C2/30; E04C2/34; E04C2/36; B32B2262/00; B32B2262/10; B32B2262/101; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0278; B32B2607/00; Y; Y10; Y10T; Y10T428/00; Y10T428/23; Y10T428/233; Y10T428/24; Y10T428/24058; Y10T428/24132; Y10T428/24174; Y10T428/24182; Y10T428/24744; Y10T428/24942; Y10T428/2495; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/24999; Y10T428/29; Y10T428/2902; Y10T428/31504; Y10T428/31511; Y10T428/31515; Y10T428/31518; Y10T428/31522
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
16 words
A panel as defined in claim 1, wherein said rigid plastic foam is rigid polyurethane foam.
Claim 2
Dependent Claim
18 words
A panel as defined in claim 1, wherein the space between said longitudinally-extending strengthening ribs is substantially void.
Claim 3
Dependent Claim
20 words
A panel as defined in claim 1, wherein the space between said longitudinally-extending strengthening ribs is occupied by insulating material.
Claim 4
Dependent Claim
26 words
A panel as defined in claim 1, wherein the space between said longitudinally-extending strengthening ribs is partially void and partially occupied by blocks of insulating material.
Claim 5
Dependent Claim
22 words
A panel as defined in claim 1, wherein said strengthening ribs are joined to said other facing layer by an epoxy adhesive.
Claim 6
Dependent Claim
22 words
A panel as defined in claim 1, wherein said strengthening ribs are joined to said other facing layer by rigid plastic foam.
Claim 7
Dependent Claim
32 words
A panel as defined in claim 1, wherein said channel members are U-shaped in section and include a pair of legs and an interconnecting web substantially at right angles to said legs.
Claim 8
Dependent Claim
38 words
A panel as defined in claim 8, wherein the junctures of said interconnecting webs and legs of the channel members are beveled whereby the rigid plastic foam layer bonded thereto is formed with longitudinally extending plastic strengthening ribs.
Claim 9
Dependent Claim
69 words
A panel as defined in claim 8, wherein said channel members are disposed with the open side of one channel member facing the open side of the next adjacent one, the rigid plastic foam bonding one leg of each channel member to said one facing layer, the other leg of each channel member being bonded to the other facing layer, the interconnecting webs constituting the longitudinally extending strengthening ribs.
Claim 10
Dependent Claim
35 words
A panel as defined in claim 8, wherein said rigid plastic foam bonds the interconnecting webs of the channel members to said one facing layer, the legs of the channel members constituting said strengthening ribs.
Claim 11
Dependent Claim
30 words
A panel as defined in claim 11, wherein said lamination further includes strips alternating with said channel members and bonded by said rigid plastic foam to said one facing layer.
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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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |