US5374459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packaging material for long-term storage of food products
Assignee: Cryovac LLC
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Filing: 1993-04-06
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Granted: 1994-12-20
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Expires: 2013-04-06
Abstract
Abstract A thermoplastic laminate suitable for long-term storage of food products includes a first substrate having a core layer of ethylene vinyl alcohol copolymer, two interior adhesive layers, and two surface layers each comprising a blend of a linear ethylene alpha olefin copolymer and an ethylene unsaturated ester copolymer; and a second substrate comprising an olefinic material of monolayer or multilayer construction, and preferably of substantiallly the same composition as the first substrate; and the second substrate bonded to the first substrate preferably by means of a conventional lamination adhesive.
Inventors
- 👤 Edward L. Mumpower
- 👤 Gordon V. Sharps, Jr.
- 👤 Neal E. McCormick
- 👤 Barry J. Grant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:42
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/306; B32B27/32; B32B27/36; B32B7/00; B32B7/04; B32B7/12; B32B2307/00; B32B2307/70; B32B2307/724; B32B2307/7242; B32B2307/7244; B32B2323/00; B32B2323/04; B32B2323/046; B32B2367/00; B32B2439/00; B32B2439/70; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1379; Y10T428/1383; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/31504; Y10T428/31725; Y10T428/31739; Y10T428/31743; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
64 words
A thermoplastic laminate comprising: a) a first substrate including: i) a core layer of an oxygen barrier material; ii) two intermediate layers of an acid or acid anhydride-modified polymeric adhesive; and iii) two outer layers of a blend of linear ethylene alpha olefin copolymer and ethylene unsaturated ester copolymer; and b) a second substrate bonded to the first substrate and comprising an ethylenic material.
Claim 2
Dependent Claim
64 words
A thermoplastic laminate comprising: a) a first substrate including: i) a core layer of an oxygen barrier material; ii) two intermediate layers of an acid or acid anhydride-modified polymeric adhesive; and iii) two outer layers of a blend of linear ethylene alpha olefin copolymer and ethylene unsaturated ester copolymer; and b) a second substrate bonded to the first substrate and comprising an ethylenic material.
Claim 3
Dependent Claim
15 words
A laminate according to claim 1 wherein the core layer comprises ethylene vinyl alcohol copolymer.
Claim 4
Dependent Claim
21 words
A laminate according to claim 1 wherein the intermediate layer comprises a polyolefin based, acid or acid anhydride grafted polymeric adhesive.
Claim 5
Dependent Claim
19 words
A laminate according to claim 1 wherein the linear ethylene alpha olefin copolymer comprises a linear low density polyethylene.
Claim 6
Dependent Claim
17 words
A laminate according to claim 1 wherein the ethylene unsaturated ester copolymer comprises ethylene vinyl acetate copolymer.
Claim 7
Dependent Claim
28 words
A laminate according to claim 1 wherein the olefinic material of the second substrate comprises a blend of linear ethylene alpha olefin copolymer and ethylene unsaturated ester copolymer.
Claim 8
Dependent Claim
21 words
A laminate according to claim 1 wherein the first substrate is bonded to the second substrate by a conventional lamination adhesive.
Claim 9
Dependent Claim
15 words
A laminate according to claim 1 wherein the first substrate or second substrate is crosslinked.
Claim 10
Dependent Claim
15 words
A laminate according to claim 1 wherein the first substrate or second substrate is oriented.
Claim 11
Dependent Claim
9 words
A package made from the laminate of claim 1.
Claim 12
Dependent Claim
73 words
A thermoplastic laminate comprising: a) a first substrate including: i) a core layer of an oxygen barrier material; ii) two intermediate layers of an acid or acid anhydride-modified polymeric adhesive; and iii) two outer layers of a blend of linear ethylene alpha olefin copolymer and ethylene unsaturated ester copolymer; and b) a second substrate bonded to the first substrate and comprising the same layers having substantially the same composition as the first substrate.
Claim 13
Dependent Claim
73 words
A thermoplastic laminate comprising: a) a first substrate including: i) a core layer of an oxygen barrier material; ii) two intermediate layers of an acid or acid anhydride-modified polymeric adhesive; and iii) two outer layers of a blend of linear ethylene alpha olefin copolymer and ethylene unsaturated ester copolymer; and b) a second substrate bonded to the first substrate and comprising the same layers having substantially the same composition as the first substrate.
Claim 14
Dependent Claim
15 words
A laminate according to claim 11 wherein the core layer comprises ethylene vinyl alcohol copolymer.
Claim 15
Dependent Claim
21 words
A laminate according to claim 11 wherein the intermediate layer comprises a polyolefin based, acid or acid anhydride grafted polymeric adhesive.
Claim 16
Dependent Claim
19 words
A laminate according to claim 11 wherein the linear ethylene alpha olefin copolymer comprises a linear low density polyethylene.
Claim 17
Dependent Claim
17 words
A laminate according to claim 11 wherein the ethylene unsaturated ester copolymer comprises ethylene vinyl acetate copolymer.
Claim 18
Dependent Claim
21 words
A laminate according to claim 11 wherein the first substrate is bonded to the second substrate by a conventional lamination adhesive.
Claim 19
Dependent Claim
15 words
A laminate according to claim 11 wherein the first substrate or second substrate is crosslinked.
Claim 20
Dependent Claim
15 words
A laminate according to claim 11 wherein the first substrate or second substrate is oriented.
Claim 21
Dependent Claim
9 words
A package made from the laminate of claim 11.
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) | 1997-12-19 | 1998-06-20 | 1998-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-19 | 2002-06-20 | 2002-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-19 | 2006-06-20 | 2006-12-20 | $7700.00 | Window Closed / Lapsed |