Patent US6259692B1 successfully refreshed from Google Patents.
US4701360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat sealable barrier material for improved juice packaging (EVOH)
Assignee: International Paper Co
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Filing: 1986-05-16
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Granted: 1987-10-20
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Expires: 2006-05-16
Abstract
Abstract The present invention relates to an improved container for citrus juices and other liquids. The container utilizes a paperboard barrier laminate for the containment of essential oils and the prevention of losses of Vitamin C. Also disclosed is a process of making the laminate. The laminate makes use of a layer of a heat-sealable ethylene vinyl alcohol copolymer to enhance the barrier properties of the laminate.
Inventors
- 👤 Charles E. Gibbons
- 👤 Allan A. Whillock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:39
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/10; B65; B65D; B65D5/00; B32B15/00; B32B15/04; B32B15/08; B32B15/085; B32B15/20; B32B27/08; B32B27/30; B32B27/304; B32B27/306; B32B27/32; B32B27/34; B32B27/36; B32B38/00; B32B38/0008; B65D65/00; B65D65/38; B65D65/46; B32B2307/00; B32B2307/30; B32B2307/31; B32B2307/70; B32B2307/724; B32B2307/7242; B32B2307/7244; B32B2311/00; B32B2311/24; B32B2323/00; B32B2323/04; B32B2323/046; B32B2327/00; B32B2327/06; B32B2329/00; B32B2329/04; B32B2367/00; B32B2377/00; B32B2439/00; B32B2439/70; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1303; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31725; Y10T428/3175; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31902; Y10T428/31909; Y10T428/31913; Y10T428/3192
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
119 words
A container for liquids containing essential oils and/or flavors, said container constructed from a laminate comprising: (a) a paperboard substrate; (b) an outer layer of a heat-sealable low density polyethylene polymer coated on said outer surface of said paperboard substrate; (c) an inner layer of heat-sealable low density polyethylene polymer coated on said inner surface of said paperboard substrate; and (d) a liquid contact layer of ethylene vinyl alcohol copolymer heat-sealed with the outside layer of low density polyethylene of the laminate on conventional equipment at temperatures ranging from 250° F.-500° F. extrusion coated on said outer surface of said inner layer of said polyethylene polymer, acting as a barrier to the transport of oxygen and essential oils/flavors therethrough.
Claim 2
Dependent Claim
119 words
A container for liquids containing essential oils and/or flavors, said container constructed from a laminate comprising: (a) a paperboard substrate; (b) an outer layer of a heat-sealable low density polyethylene polymer coated on said outer surface of said paperboard substrate; (c) an inner layer of heat-sealable low density polyethylene polymer coated on said inner surface of said paperboard substrate; and (d) a liquid contact layer of ethylene vinyl alcohol copolymer heat-sealed with the outside layer of low density polyethylene of the laminate on conventional equipment at temperatures ranging from 250° F.-500° F. extrusion coated on said outer surface of said inner layer of said polyethylene polymer, acting as a barrier to the transport of oxygen and essential oils/flavors therethrough.
Claim 3
Dependent Claim
27 words
The container as claimed in claim 1 wherein said outer layer of a low density polyethylene polymer is corona discharge treated to enhance heat-sealability of said laminate.
Claim 4
Dependent Claim
26 words
The container as claimed in claim 1 wherein said outer layer of a low density polyethylene polymer is flame treated to enhance heat-sealability of said laminate.
Claim 5
Dependent Claim
33 words
The container as claimed in claim 2 wherein said surface of said inner layer of said heat-sealable low density polyethylene polymer is corona discharge treated to enhance adhesion of said heat-sealable EVOH layer.
Claim 6
Dependent Claim
32 words
The container as claimed in claim 3 wherein said surface of said inner layer of said heat-sealable low density polyethylene polymer is flame treated to enhance adhesion of said heat-sealable EVOH layer.
Claim 7
Dependent Claim
155 words
A container for liquids containing essential oils and/or flavors constructed form a laminate comprising: (a) a paperboard substrate; (b) an outer layer of a heat-sealable low density polyethylene polymer coated on said outer surface of said paperboard substrate; (c) an inner layer of a heat-sealable low density polyethylene polymer coated on said inner surface of said paperboard substrate; (d) an oxygen barrier material layer coated on said outer surface of said inner layer of said polyethylene polymer; (e) a tie layer of a heat-sealable low density polyethylene polymer coated on said outer surface of said oxygen barrier materials; and (f) a heat-sealable liquid contact layer of an ethylene vinyl alcohol copolymer extrusion coated on said outer surface of said tie layer, which is heat-sealed with the outer layer of low density polyethylene on conventional equipment at temperatures ranging from 250° F.-500° F., acting as a barrier to the transport of oxygen and essential flavor/oils therethrough.
Claim 8
Dependent Claim
155 words
A container for liquids containing essential oils and/or flavors constructed form a laminate comprising: (a) a paperboard substrate; (b) an outer layer of a heat-sealable low density polyethylene polymer coated on said outer surface of said paperboard substrate; (c) an inner layer of a heat-sealable low density polyethylene polymer coated on said inner surface of said paperboard substrate; (d) an oxygen barrier material layer coated on said outer surface of said inner layer of said polyethylene polymer; (e) a tie layer of a heat-sealable low density polyethylene polymer coated on said outer surface of said oxygen barrier materials; and (f) a heat-sealable liquid contact layer of an ethylene vinyl alcohol copolymer extrusion coated on said outer surface of said tie layer, which is heat-sealed with the outer layer of low density polyethylene on conventional equipment at temperatures ranging from 250° F.-500° F., acting as a barrier to the transport of oxygen and essential flavor/oils therethrough.
Claim 9
Dependent Claim
19 words
The container as claimed in claim 6 wherein said oxygen barrier material layer is an ethylene vinyl alcohol copolymer.
Claim 10
Dependent Claim
17 words
The container as claimed in claim 6 wherein said oxygen barrier material layer is a polyvinyl alcohol.
Claim 11
Dependent Claim
19 words
The container as claimed in claim 6 wherein said oxygen barrier material layer is a layer of aluminum foil.
Claim 12
Dependent Claim
19 words
The container as claimed in claim 6 wherein said oxygen barrier material layer is a layer of polyethylene terephthalate.
Claim 13
Dependent Claim
21 words
The container as claimed in claim 6 wherein said oxygen barrier material layer is a layer of glycol modified polyethylene terephthalate.
Claim 14
Dependent Claim
21 words
The container as claimed in claim 6 wherein said oxygen barrier material layer is a layer of acid modified polyethylene terephthalate.
Claim 15
Dependent Claim
19 words
The container as claimed in claim 6 wherein said oxygen barrier material layer is a layer of polyvinylidene chloride.
Claim 16
Dependent Claim
20 words
The container as claimed in claim 6 wherein said oxygen barrier material layer is a layer of vinylidine chloride copolymer.
Claim 17
Dependent Claim
20 words
The container as claimed in claim 6 wherein said oxygen barrier material layer is a layer of polyvinyl chloride polymer.
Claim 18
Dependent Claim
20 words
The container as claimed in claim 6 wherein said oxygen barrier material layer is a layer of vinyl chloride copolymer.
Claim 19
Dependent Claim
18 words
The container as claimed in claim 6 wherein said oxygen barrier material layer is a layer of polyamide.
Claim 20
Dependent Claim
19 words
The container as claimed in claim 6 wherein said oxygen barrier material layer is a layer of polyamide copolymers.
Claim 21
Dependent Claim
27 words
The container as claimed in claim 6 wherein said outer layer of said low density polyethylene polymer is corona discharge treated to enhance heat-sealability of said laminate.
Claim 22
Dependent Claim
26 words
The container as claimed in claim 6 wherein said outer layer of said low density polyethylene polymer is flame treated to enhance heat-sealability of said laminate.
Claim 23
Dependent Claim
29 words
The container as claimed in claim 19 wherein said inner layer of said low-density polyethylene polymer is corona discharge treated to enhance adhesion of said subsequent heat-sealable EVOH coating.
Claim 24
Dependent Claim
28 words
The container as claimed in claim 20 wherein said inner layer of said low-density polyethylene polymer is flame treated to enhance adhesion of said subsequent heat-sealable EVOH coating.
Claim 25
Dependent Claim
80 words
A container for liquids constructed from a laminate comprising: (a) a paperboard substrate; (b) an outer layer of a heat-sealable ethylene vinyl alcohol copolymer/low density polyethylene blend coated on said outer surface of said paperboard substrate; (c) an inner layer of a heat-sealable low density polyethylene polymer coated on said inner surface of said paperboard substrate; and (d) a heat-sealable layer of an ethylene vinyl alcohol copolymer coated on said outer surface of said inner layer of said polyethylene polymer.
Claim 26
Dependent Claim
80 words
A container for liquids constructed from a laminate comprising: (a) a paperboard substrate; (b) an outer layer of a heat-sealable ethylene vinyl alcohol copolymer/low density polyethylene blend coated on said outer surface of said paperboard substrate; (c) an inner layer of a heat-sealable low density polyethylene polymer coated on said inner surface of said paperboard substrate; and (d) a heat-sealable layer of an ethylene vinyl alcohol copolymer coated on said outer surface of said inner layer of said polyethylene polymer.
Claim 27
Dependent Claim
33 words
The container as claimed in claim 23 wherein said surface of said inner layer of said heat-sealable low density polyethylene polymer is corona discharge treated to enhance adhesion of said heat-sealable EVOH layer.
Claim 28
Dependent Claim
32 words
The container as claimed in claim 23 wherein said surface of said inner layer of said heat-sealable low density polyethylene polymer is flame treated to enhance adhesion of said heat-sealable EVOH 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) | 1990-10-19 | 1991-04-20 | 1991-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-19 | 1995-04-20 | 1995-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-19 | 1999-04-20 | 1999-10-20 | $7700.00 | Window Closed / Lapsed |