Patent US2131610A successfully refreshed from Google Patents.
US4425410A
Expired / Lapsed
US
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Drying agent in multi-layer polymeric structure
Assignee: Pechiney Plastic Packaging Inc
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Filing: 1982-09-15
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Granted: 1984-01-10
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Expires: 2002-09-15
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 14:54
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: 32
Claim 1
Independent Claim
34 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 the moisture sensitive oxygen barrier layer.
Claim 2
Dependent Claim
34 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 the moisture sensitive oxygen barrier layer.
Claim 3
Dependent Claim
13 words
The multi-layer structure of claim 1 wherein the drying agent is calcium chloride.
Claim 4
Dependent Claim
13 words
The multi-layer structure of claim 1 wherein the drying agent is sodium chloride.
Claim 5
Dependent Claim
13 words
The multi-layer structure of claim 1 wherein the drying agent is sodium phosphate-di-basic.
Claim 6
Dependent Claim
12 words
The multi-layer structure of claim 1 wherein the drying agent is sucrose.
Claim 7
Dependent Claim
13 words
The multi-layer structure of claim 1 wherein the drying agent is potassium carbonate.
Claim 8
Dependent Claim
13 words
The multi-layer structure of claim 1 wherein the drying agent is aluminum sulphate.
Claim 9
Dependent Claim
13 words
The multi-layer structure of claim 1 wherein the drying agent is magnesium sulphate.
Claim 10
Dependent Claim
13 words
The multi-layer structure of claim 1 wherein the drying agent is magnesium chloride.
Claim 11
Dependent Claim
13 words
The multi-layer structure of claim 1 wherein the drying agent is sodium nitrate.
Claim 12
Dependent Claim
13 words
The multi-layer structure of claim 1 wherein the drying agent is ammonium sulphate.
Claim 13
Dependent Claim
13 words
The multi-layer structure of claim 1 wherein the drying agent is ammonium phosphate-monobasic.
Claim 14
Dependent Claim
13 words
The multi-layer structure of claim 1 wherein the drying agent is potassium bromide.
Claim 15
Dependent Claim
43 words
The multi-layer structure of claim 1 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 16
Dependent Claim
38 words
In a multi-layer polymeric structure having a layer of a moisture sensitive oxygen barrier polymer, and exterior layers of structural polymer, the improvment which comprises the incorporation of a drying agent entrapped in one of the exterior layers.
Claim 17
Dependent Claim
38 words
In a multi-layer polymeric structure having a layer of a moisture sensitive oxygen barrier polymer, and exterior layers of structural polymer, the improvment which comprises the incorporation of a drying agent entrapped in one of the exterior layers.
Claim 18
Dependent Claim
13 words
The multi-layer structure of claim 15 wherein the drying agent is calcium chloride.
Claim 19
Dependent Claim
13 words
The multi-layer structure of claim 15 wherein the drying agent is sodium chloride.
Claim 20
Dependent Claim
13 words
The multi-layer structure of claim 15 wherein the drying agent is sodium phosphate-di-basic.
Claim 21
Dependent Claim
13 words
The multi-layer structure of claim 15 wherein the drying agent is ammonium chloride.
Claim 22
Dependent Claim
12 words
The multi-layer structure of claim 15 wherein the drying agent is sucrose.
Claim 23
Dependent Claim
13 words
The multi-lyaer structure of claim 15 wherein the drying agent is potassium carbonate.
Claim 24
Dependent Claim
14 words
The multi-layer structure of claim 15 wherein the drying agent is potassium aluminum sulphate.
Claim 25
Dependent Claim
13 words
The multi-layer structure of claim 15 wherein the drying agent is magnesium sulphate.
Claim 26
Dependent Claim
13 words
The multi-layer structure of claim 15 wherein the drying agent is magnesium chloride.
Claim 27
Dependent Claim
13 words
The multi-layer structure of claim 15 wherein the drying agent is sodium nitrate.
Claim 28
Dependent Claim
13 words
The multi-layer structure of claim 15 wherein the drying agent is ammonium sulphate.
Claim 29
Dependent Claim
13 words
The multi-layer structure of claim 15 wherein the drying agent is ammonium phosphate-monobasic.
Claim 30
Dependent Claim
13 words
The multi-layer structure of claim 15 wherein the drying agent is potassium bromide.
Claim 31
Dependent Claim
38 words
In a multi-layer polymeric structure having a layer of a moisture sensitive oxygen barrier polymer, and exterior layers of structural polymer, the improvement which comprises the incorporation of a drying agent entrapped in each of the exterior layers.
Claim 32
Dependent Claim
38 words
In a multi-layer polymeric structure having a layer of a moisture sensitive oxygen barrier polymer, and exterior layers of structural polymer, the improvement which comprises the incorporation of a drying agent entrapped in each of the exterior layers.
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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) | 1987-01-09 | 1987-07-11 | 1988-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-09 | 1991-07-11 | 1992-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-09 | 1995-07-11 | 1996-01-10 | $7700.00 | Window Closed / Lapsed |