Patent US4590126A successfully refreshed from Google Patents.
US4590126A
Expired / Lapsed
US
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Packing laminate
Assignee: Tetra Pak AB
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Filing: 1984-09-28
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Granted: 1986-05-20
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Expires: 2004-09-28
Abstract
Abstract A packing laminate for the manufacture of packing containers for edible oil must have an oil-resistant inner layer which is not affected by the oil, even during prolonged storage periods. A packing laminate meeting this condition has an extruded inner layer of two types of plastics mixed with one another, namely LLDPE and LDPE.
Inventors
- 👤 Thorbjorn Andersson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:25
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/10; B32B15/00; B32B15/04; B32B15/08; B32B15/085; B32B15/20; B32B27/065; B32B27/32; B32B27/322; B32B5/00; B32B5/18; B32B7/00; B32B7/04; B32B7/12; B32B2270/00; B32B2307/00; B32B2307/70; B32B2307/724; B32B2307/7242; B32B2311/00; B32B2311/24; B32B2323/00; B32B2323/04; B32B2323/046; B32B2439/00; B32B2439/70; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31692; Y10T428/31855; Y10T428/3188; Y10T428/31895
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
93 words
A multi-layer packing laminate including a carrier layer of material imparting stiffness to the laminate, a layer of low-density polyethylene provided on one side of the carrier layer, a layer of foil provided on the layer of low-density polyethylene, a layer of adhesive material provided on the foil layer, an additional layer of low-density polyethylene provided on the opposite side of the carrier layer, the improvement comprising: a layer of liquid-tight material extruded on the adhesive layer, the layer of liquid-tight material being an admixture consisting of low-density polyethylene and linear low-density polyethylene.
Claim 2
Dependent Claim
93 words
A multi-layer packing laminate including a carrier layer of material imparting stiffness to the laminate, a layer of low-density polyethylene provided on one side of the carrier layer, a layer of foil provided on the layer of low-density polyethylene, a layer of adhesive material provided on the foil layer, an additional layer of low-density polyethylene provided on the opposite side of the carrier layer, the improvement comprising: a layer of liquid-tight material extruded on the adhesive layer, the layer of liquid-tight material being an admixture consisting of low-density polyethylene and linear low-density polyethylene.
Claim 3
Dependent Claim
31 words
A packing laminate in accordance with claim 1, wherein the linear low-density polyethylene content in the layer is in the range of 50 to 90% of total weight of the mixture.
Claim 4
Dependent Claim
34 words
A packing laminate in accordance with claim 2, wherein the linear low-density polyethylene admixture is substantially 85% by weight of the total weight of linear low-density polyethylene and low-density polyethylene in the plastic layer.
Claim 5
Dependent Claim
27 words
A packing laminate in accordance with claim 1, wherein said layer has a coating weight in the range of 20 g/m 2 to 30 g/m 2 .
Claim 6
Dependent Claim
26 words
A packing laminate in accordance with claim 1, wherein the adhesive layer has a coating weight in the range of 1 to 15 g/m 2 .
Claim 7
Dependent Claim
29 words
A packing lamainate in accordance with claim 5, wherein the adhesive layer and the plastic layer have a combined coating weight of a minimum of 30 g/m 2 .
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) | 1989-05-19 | 1989-11-18 | 1990-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-19 | 1993-11-18 | 1994-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-19 | 1997-11-18 | 1998-05-20 | $7700.00 | Window Closed / Lapsed |