Patent US2645528A successfully refreshed from Google Patents.
Patent US5037683A successfully refreshed from Google Patents.
US5037683A
Expired / Lapsed
US
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High strength laminated film for chub packaging
Assignee: Cryovac LLC
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Filing: 1988-09-26
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Granted: 1991-08-06
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Expires: 2008-09-26
Abstract
Abstract A multilayer laminated film useful in chub packaging comprises a core film comprising a biaxially oriented film, and an outer hot blown film bonded to each of the opposing surfaces of the core layer, at least one of the films including a layer of an oxygen barrier polymeric material.
Inventors
- 👤 Henry G. Schirmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:55
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/304; B32B27/306; B32B27/32; B32B27/34; B32B2250/00; B32B2250/40; B32B2305/00; B32B2305/72; B32B2307/00; B32B2307/70; B32B2307/724; B32B2307/7242; B32B2307/7244; B32B2323/00; B32B2323/04; B32B2323/046; B32B2327/00; B32B2329/00; B32B2377/00; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1324; Y10T428/1334; Y10T428/1352; Y10T428/1379; Y10T428/1383; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192; Y10T428/31928
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
90 words
A multilayer laminate useful in chub packaging comprising: a) a core film comprising a biaxially oriented film having i) a central layer of ethylene alpha-olefin copolymer selected from the group consisting of linear low density polyethylene and very low density polyethylene; and ii) outer layers of ethylene vinyl acetate copolymer; and b) an outer film bonded to each of the opposing surfaces of the core film, and comprising a hot blown film; c) wherein at least one of the outer films includes a layer of an oxygen barrier polymeric material.
Claim 2
Dependent Claim
90 words
A multilayer laminate useful in chub packaging comprising: a) a core film comprising a biaxially oriented film having i) a central layer of ethylene alpha-olefin copolymer selected from the group consisting of linear low density polyethylene and very low density polyethylene; and ii) outer layers of ethylene vinyl acetate copolymer; and b) an outer film bonded to each of the opposing surfaces of the core film, and comprising a hot blown film; c) wherein at least one of the outer films includes a layer of an oxygen barrier polymeric material.
Claim 3
Dependent Claim
13 words
The laminate according to claim 1 wherein the biaxially oriented film is cross-linked.
Claim 4
Dependent Claim
21 words
The laminate according to claim 2 wherein the biaxially oriented film is cross-linked by the use of a chemical cross-linking agent.
Claim 5
Dependent Claim
18 words
The laminate according to claim 2 wherein the biaxially oriented film is cross-linked by irradiation of the film.
Claim 6
Dependent Claim
28 words
The laminate according to claim 1 wherein the oxygen barrier polymeric material is selected from the group consisting of vinylidene chloride copolymer, ethylene vinyl alcohol copolymer, and polyamide.
Claim 7
Dependent Claim
41 words
A multilayer laminate according to claim 1 wherein the biaxially oriented film has a central and outer layers of ethylene vinyl acetate copolymer, and, between said central layer and each of said outer layers, an intermediate layer of ethylene alpha-olefin copolymer.
Claim 8
Dependent Claim
27 words
The laminate according to claim 6 wherein the ethylene alpha-olefin copolymer is selected from the group consisting of linear low density polyethylene and very low density polyethylene.
Claim 9
Dependent Claim
36 words
A multilayer laminate according to claim 1 wherein the hot blown film has a central layer of ethylene vinyl alcohol copolymer, an outer heat sealable layer, and an inner bonding layer of ethylene vinyl acetate copolymer.
Claim 10
Dependent Claim
79 words
A multilayer laminate according to claim 8 wherein the hot blown film comprises: a) a first layer of a heat sealable material; b) a second layer of a linear low density polyethylene; c) a third layer of a polymeric adhesive; d) a fourth layer of an ethylene vinyl alcohol copolymer; e) a fifth layer of a polymeric adhesive; f) a sixth layer of a linear low density polyethylene; and g) a seventh layer of an ethylene vinyl acetate copolymer.
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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) | 1994-08-05 | 1995-02-04 | 1995-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-05 | 1999-02-04 | 1999-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-05 | 2003-02-04 | 2003-08-06 | $7700.00 | Window Closed / Lapsed |