US4407897A
Expired / Lapsed
US
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Drying agent in multi-layer polymeric structure
Assignee: Pechiney Plastic Packaging Inc
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Filing: 1979-12-10
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Granted: 1983-10-04
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Expires: 1999-12-10
Abstract
Abstract In a multi-layer polymeric structure having an interior oxygen barrier layer of a moisture sensitive polymeric material such as ethylene-vinyl alcohol, drying agents are incorporated in the structure, particularly in a layer or layers proximate to the barrier layer, to limit the moisture content of the barrier layer to maintain barrier properties.
Inventors
- 👤 Christopher J. Farrell
- 👤 Boh C. Tsai
- 👤 James A. Wachtel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:21
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/18; B32B27/32; B32B7/00; B32B7/04; B32B7/12; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/1341; Y10T428/1352; Y10T428/1379; Y10T428/1383; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192
Claims Analysis
Total Claims: 84
Claim 1
Independent Claim
39 words
In a multi-layer polymeric structure having an interior layer of a moisture sensitive oxygen barrier polymer, the improvement which comprises the incorporation of a drying agent entrapped in a layer of the structure to protect said moisture sensitive layer.
Claim 2
Dependent Claim
39 words
In a multi-layer polymeric structure having an interior layer of a moisture sensitive oxygen barrier polymer, the improvement which comprises the incorporation of a drying agent entrapped in a layer of the structure to protect said moisture sensitive layer.
Claim 3
Dependent Claim
41 words
In a multi-layer polymeric structure having an interior layer of a moisture sensitive oxygen barrier polymer, the improvement which comprises the incorporation of a drying agent entrapped in a layer of the structure which is proximate to said moisture sensitive layer.
Claim 4
Dependent Claim
41 words
In a multi-layer polymeric structure having an interior layer of a moisture sensitive oxygen barrier polymer, the improvement which comprises the incorporation of a drying agent entrapped in a layer of the structure which is proximate to said moisture sensitive layer.
Claim 5
Dependent Claim
13 words
The multi-layer structure of claim 1 wherein the drying agent is calcium chloride.
Claim 6
Dependent Claim
13 words
The multi-layer structure of claim 1 wherein the drying agent is sodium chloride.
Claim 7
Dependent Claim
13 words
The multi-layer structure of claim 1 wherein the drying agent is sodium phosphate-di-basic.
Claim 8
Dependent Claim
13 words
The multi-layer structure of claim 1 wherein the drying agent is ammonium chloride.
Claim 9
Dependent Claim
12 words
The multi-layer structure of claim 1 wherein the drying agent is sucrose.
Claim 10
Dependent Claim
13 words
The multi-layer structure of claim 1 wherein the drying agent is potassium carbonate.
Claim 11
Dependent Claim
14 words
The multi-layer structure of claim 1 wherein the drying agent is potassium aluminum sulphate.
Claim 12
Dependent Claim
13 words
The multi-layer structure of claim 1 wherein the drying agent is magnesium sulphate.
Claim 13
Dependent Claim
13 words
The multi-layer structure of claim 1 wherein the drying agent is magnesium chloride.
Claim 14
Dependent Claim
13 words
The multi-layer structure of claim 1 wherein the drying agent is sodium nitrate.
Claim 15
Dependent Claim
13 words
The multi-layer structure of claim 1 wherein the drying agent is ammonium sulphate.
Claim 16
Dependent Claim
13 words
The multi-layer structure of claim 1 wherein the drying agent is ammonium phosphate-monobasic.
Claim 17
Dependent Claim
13 words
The multi-layer structure of claim 1 wherein the drying agent is potassium bromide.
Claim 18
Dependent Claim
41 words
A multi-layer polymeric structure comprising an interior layer of a moisture sensitive oxygen barrier polymer, exterior layers of a structural polymer, and intermediate layers of an adherent polymer between the interior and exterior layers, the intermediate layers containing a drying agent.
Claim 19
Dependent Claim
41 words
A multi-layer polymeric structure comprising an interior layer of a moisture sensitive oxygen barrier polymer, exterior layers of a structural polymer, and intermediate layers of an adherent polymer between the interior and exterior layers, the intermediate layers containing a drying agent.
Claim 20
Dependent Claim
34 words
A multi-layer polymeric structure comprising an interior layer of a moisture sensitive oxygen barrier polymer, exterior layers of polyolefin, and intermediate layers of an adherent modified polyolefin, the modified polyolefin containing a drying agent.
Claim 21
Dependent Claim
34 words
A multi-layer polymeric structure comprising an interior layer of a moisture sensitive oxygen barrier polymer, exterior layers of polyolefin, and intermediate layers of an adherent modified polyolefin, the modified polyolefin containing a drying agent.
Claim 22
Dependent Claim
27 words
A multi-layer structure comprising an interior oxygen barrier layer of ethylene-vinyl alcohol, exterior layers of polyolefin, and intermediate layers of adherent modified polyolefin containing a drying agent.
Claim 23
Dependent Claim
27 words
A multi-layer structure comprising an interior oxygen barrier layer of ethylene-vinyl alcohol, exterior layers of polyolefin, and intermediate layers of adherent modified polyolefin containing a drying agent.
Claim 24
Dependent Claim
13 words
The multi-layer structure of claim 18 wherein the drying agent is calcium chloride.
Claim 25
Dependent Claim
13 words
The multi-layer structure of claim 18 wherein the drying agent is sodium chloride.
Claim 26
Dependent Claim
13 words
The multi-layer structure of claim 18 wherein the drying agent is ammonium chloride.
Claim 27
Dependent Claim
13 words
The multi-layer structure of claim 18 wherein the drying agent is sodium phosphate-di-basic.
Claim 28
Dependent Claim
12 words
The multi-layer structure of claim 18 wherein the drying agent is sucrose.
Claim 29
Dependent Claim
13 words
The multi-layer structure of claim 18 wherein the drying agent is potassium carbonate.
Claim 30
Dependent Claim
14 words
The multi-layer structure of claim 18 wherein the drying agent is potassium aluminum sulphate.
Claim 31
Dependent Claim
13 words
The multi-layer structure of claim 18 wherein the drying agent is magnesium sulphate.
Claim 32
Dependent Claim
13 words
The multi-layer structure of claim 18 wherein the drying agent is magnesium chloride.
Claim 33
Dependent Claim
13 words
The multi-layer structure of claim 18 wherein the drying agent is sodium nitrate.
Claim 34
Dependent Claim
13 words
The multi-layer structure of claim 18 wherein the drying agent is ammonium phosphate-monobasic.
Claim 35
Dependent Claim
13 words
The multi-layer structure of claim 18 wherein the drying agent is potassium bromide.
Claim 36
Dependent Claim
13 words
The multi-layer structure of claim 18 wherein the drying agent is ammonium sulphate.
Claim 37
Dependent Claim
42 words
In a multi-layer polymeric structure having an interior layer of a moisture sensitive oxygen barrier polymer, the improvement which comprises the incorporation of a drying agent entrapped in a layer of the structure to protect the oxygen barrier quality of the structure.
Claim 38
Dependent Claim
42 words
In a multi-layer polymeric structure having an interior layer of a moisture sensitive oxygen barrier polymer, the improvement which comprises the incorporation of a drying agent entrapped in a layer of the structure to protect the oxygen barrier quality of the structure.
Claim 39
Dependent Claim
13 words
The multi-layer structure of claim 32 wherein the drying agent is calcium chloride.
Claim 40
Dependent Claim
13 words
The multi-layer structure of claim 32 wherein the drying agent is sodium chloride.
Claim 41
Dependent Claim
13 words
The multi-layer structure of claim 32 wherein the drying agent is sodium phosphate-di-basic.
Claim 42
Dependent Claim
13 words
The multi-layer structure of claim 32 wherein the drying agent is ammonium chloride.
Claim 43
Dependent Claim
12 words
The multi-layer structure of claim 32 wherein the drying agent is sucrose.
Claim 44
Dependent Claim
13 words
The multi-layer structure of claim 32 wherein the drying agent is potassium carbonate.
Claim 45
Dependent Claim
14 words
The multi-layer structure of claim 32 wherein the drying agent is potassium aluminum sulphate.
Claim 46
Dependent Claim
13 words
The multi-layer structure of claim 32 wherein the drying agent is magnesium sulphate.
Claim 47
Dependent Claim
13 words
The multi-layer structure of claim 32 wherein the drying agent is magnesium chloride.
Claim 48
Dependent Claim
13 words
The multi-layer structure of claim 32 wherein the drying agent is sodium nitrate.
Claim 49
Dependent Claim
13 words
The multi-layer structure of claim 32 wherein the drying agent is ammonium sulphate.
Claim 50
Dependent Claim
13 words
The multi-layer structure of claim 32 wherein the drying agent is ammonium phosphate-monobasic.
Claim 51
Dependent Claim
13 words
The multi-layer structure of claim 32 wherein the drying agent is potassium bromide.
Claim 52
Dependent Claim
49 words
The multi-layer structure of claim 1, 2, 16, 17, 18, or 32, wherein the drying agent has a high drying capacity at a water activity below about 0.85 and wherein the drying capacity at about 0.85 water activity is greater than the drying capacity at about 0.1 water activity.
Claim 53
Dependent Claim
45 words
A multi-layer polymeric structure comprising an interior layer of a moisture sensitive oxygen barrier polymer selected from the group consisting of ethylene-vinyl alcohol and polyvinyl alcohol, and a layer in which is incorporated a drying agent and which is proximate to said moisture sensitive layer.
Claim 54
Dependent Claim
45 words
A multi-layer polymeric structure comprising an interior layer of a moisture sensitive oxygen barrier polymer selected from the group consisting of ethylene-vinyl alcohol and polyvinyl alcohol, and a layer in which is incorporated a drying agent and which is proximate to said moisture sensitive layer.
Claim 55
Dependent Claim
13 words
The multi-layer structure of claim 47 wherein the drying agent is calcium chloride.
Claim 56
Dependent Claim
13 words
The multi-layer structure of claim 47 wherein the drying agent is sodium chloride.
Claim 57
Dependent Claim
13 words
The multi-layer structure of claim 47 wherein the drying agent is sodium phosphate-di-basic.
Claim 58
Dependent Claim
13 words
The multi-layer structure of claim 47 wherein the drying agent is ammonium chloride.
Claim 59
Dependent Claim
12 words
The multi-layer structure of claim 47 wherein the drying agent is sucrose.
Claim 60
Dependent Claim
13 words
The multi-layer structurer of claim 47 wherein the drying agent is potassium carbonate.
Claim 61
Dependent Claim
14 words
The multi-layer structure of claim 47 wherein the drying agent is potassium aluminum sulphate.
Claim 62
Dependent Claim
13 words
The multi-layer structure of claim 47 wherein the drying agent is magnesium sulphate.
Claim 63
Dependent Claim
13 words
The multi-layer structure of claim 47 wherein the drying agent is magnesium chloride.
Claim 64
Dependent Claim
13 words
The multi-layer structure of claim 47 wherein the drying agent is sodium nitrate.
Claim 65
Dependent Claim
13 words
The multi-layer structure of claim 47 wherein the drying agent is ammonium sulphate.
Claim 66
Dependent Claim
13 words
The multi-layer structure of claim 47 wherein the drying agent is ammonium phosphate-monobasic.
Claim 67
Dependent Claim
13 words
The multi-layer structure of claim 47 wherein the drying agent is potassium bromide.
Claim 68
Dependent Claim
48 words
A multi-layer polymeric structure comprising an interior layer of a moisture sensitive oxygen barrier polymer, exterior layers of a structural polymer, and an intermediate layer of an adherent polymer between the interior layer and at least one of the exterior layers, the intermediate layer containing a drying agent.
Claim 69
Dependent Claim
48 words
A multi-layer polymeric structure comprising an interior layer of a moisture sensitive oxygen barrier polymer, exterior layers of a structural polymer, and an intermediate layer of an adherent polymer between the interior layer and at least one of the exterior layers, the intermediate layer containing a drying agent.
Claim 70
Dependent Claim
46 words
A multi-layer polymeric structure comprising an interior layer of a moisture sensitive oxygen barrier polymer selected from the group consisting of ethylene-vinyl alcohol and polyvinyl alcohol, and a layer in which is incorporated a drying agent and which is not proximate to said moisture sensitive layer.
Claim 71
Dependent Claim
46 words
A multi-layer polymeric structure comprising an interior layer of a moisture sensitive oxygen barrier polymer selected from the group consisting of ethylene-vinyl alcohol and polyvinyl alcohol, and a layer in which is incorporated a drying agent and which is not proximate to said moisture sensitive layer.
Claim 72
Dependent Claim
13 words
The multi-layer structure of claim 62 wherein the drying agent is calcium chloride.
Claim 73
Dependent Claim
13 words
The multi-layer structure of claim 62 wherein the drying agent is sodium chloride.
Claim 74
Dependent Claim
13 words
The multi-layer structure of claim 62 wherein the drying agent is sodium phosphate-di-basic.
Claim 75
Dependent Claim
13 words
The multi-layer structure of claim 62 wherein the drying agent is ammonium chloride.
Claim 76
Dependent Claim
12 words
The multi-layer structure of claim 62 wherein the drying agent is sucrose.
Claim 77
Dependent Claim
13 words
The multi-layer structure of claim 62 wherein the drying agent is potassium carbonate.
Claim 78
Dependent Claim
14 words
The multi-layer structure of claim 62 wherein the drying agent is potassium aluminum sulphate.
Claim 79
Dependent Claim
13 words
The multi-layer structure of claim 62 wherein the drying agent is magnesium sulphate.
Claim 80
Dependent Claim
13 words
The multi-layer structure of claim 62 wherein the drying agent is magnesium chloride.
Claim 81
Dependent Claim
13 words
The multi-layer structure of claim 62 wherein the drying agent is sodium nitrate.
Claim 82
Dependent Claim
13 words
The multi-layer structure of claim 62 wherein the drying agent is ammonium sulphate.
Claim 83
Dependent Claim
13 words
The multi-layer structure of claim 62 wherein the drying agent is ammonium phosphate-monobasic.
Claim 84
Dependent Claim
13 words
The multi-layer structure of claim 62 wherein the drying agent is potassium bromide.
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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) | 1986-10-03 | 1987-04-04 | 1987-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-03 | 1991-04-04 | 1991-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-03 | 1995-04-04 | 1995-10-04 | $7700.00 | Window Closed / Lapsed |