US4452842A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated lidding material
Assignee: Pechiney Plastic Packaging Inc
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Filing: 1982-05-19
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Granted: 1984-06-05
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Expires: 2002-05-19
Abstract
Abstract A laminated lidding material suitable for use on cups of high density polyethylene and/or polypropylene comprises (1) as the bottom layer, a co-extruded layer of ethylene methyl acrylate and low density polyethylene resin, (2) a primer layer, preferably of polyurethane, (3) a layer of polyester, nylon, polypropylene or metallic foil, (4) a layer of low density polyethylene resin, and (5) a top layer of metallic foil, preferably aluminum foil. Lids prepared from this material can be adhered to the tops of high density polyethylene and/or polypropylene cups, and have sufficient strength so that they do not tear on removal.
Inventors
- 👤 Gary G. Borges
- 👤 James H. Rebholz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:27
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B15/00; B32B15/04; B32B15/08; B32B15/085; B32B15/20; B32B27/30; B32B27/308; B32B27/32; B32B27/34; B32B27/36; B32B27/40; B32B2255/00; B32B2255/06; B32B2323/00; B32B2323/04; B32B2323/046; B32B2435/00; B32B2435/02; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24843; Y10T428/24851; Y10T428/31504; Y10T428/31551; Y10T428/31562; Y10T428/31565; Y10T428/31573; Y10T428/31587; Y10T428/31605; Y10T428/31678; Y10T428/31692; Y10T428/31725; Y10T428/31739; Y10T428/31743; Y10T428/31746; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31859; Y10T428/31862; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31902; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
77 words
A laminated lidding material comprising, a co-extruded bottom layer of ethylene methyl acrylate and low density polyethylene resin, a primer layer of polyurethene, polyethylene imine or a melamine affixed to said polyethylene resin, a film layer of polyester, nylon, polypropylene or metallic foil affixed to said primed polyethylene resin, a layer of a low density polyethylene resin affixed to said film layer, and as a top layer, a metallic foil affixed to said low density polyethylene layer.
Claim 2
Dependent Claim
77 words
A laminated lidding material comprising, a co-extruded bottom layer of ethylene methyl acrylate and low density polyethylene resin, a primer layer of polyurethene, polyethylene imine or a melamine affixed to said polyethylene resin, a film layer of polyester, nylon, polypropylene or metallic foil affixed to said primed polyethylene resin, a layer of a low density polyethylene resin affixed to said film layer, and as a top layer, a metallic foil affixed to said low density polyethylene layer.
Claim 3
Dependent Claim
19 words
A lidding material according to claim 1 in which the metallic foil of the top layer is aluminum foil.
Claim 4
Dependent Claim
16 words
A lidding material according to claims 1 or 2 in which the film layer is polyester.
Claim 5
Dependent Claim
14 words
A lidding material according to claim 3 in which the primer layer is polyurethane.
Claim 6
Dependent Claim
21 words
A lidding material according to claim 4 in which the free upper surface of the aluminum layer is primed and imprinted.
Claim 7
Dependent Claim
22 words
A lidding material according to claim 5 in which the primed and printed aluminum foil layer is covered by a lacquer coating.
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) | 1987-06-05 | 1987-12-05 | 1988-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-05 | 1991-12-05 | 1992-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-05 | 1995-12-05 | 1996-06-05 | $7700.00 | Window Closed / Lapsed |