US4405400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated material
Assignee: Tetra Pak Developpement SA
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Filing: 1982-08-20
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Granted: 1983-09-20
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Expires: 2002-08-20
Abstract
Abstract The invention relates to a laminated material, the main layer of which consists of a molecular-oriented polyester material which has very good tensile strength characteristics and a sealing layer joined to the main layer of a modified polyester material of the type which is marketed under the trade name PETG and which retains its sealing characteristics in spite of the laminated material being subjected to a joint molecular-oriented stretch
Inventors
- 👤 Peter Petersen-Hoj
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:29
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/36; B32B27/06; B32B27/08; C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/199; B32B38/00; B32B38/0012; B32B2038/0028; B32B2307/00; B32B2307/30; B32B2307/31; B32B2307/50; B32B2307/54; B32B2307/70; B32B2307/702; B32B2307/704; B32B2553/00; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24959; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/2852; Y10T428/31504; Y10T428/31786
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
97 words
A method for the manufacture of a laminated material, comprising the steps of joining together at least two layers of polyester material, a first layer being modified polyester material and being of the type which can be subjected to a stretching treatment at a temperature below 100° C. without amorphous molecular structure being wholly lost, a second layer being polyester material whose molecular structure becomes crystalline when the material is subjected to a stretching at a temperature below 100° C., and subjecting the layers so combined to a joint stretching operation at a temperature below 100° C.
Claim 2
Independent Claim
97 words
A method for the manufacture of a laminated material, comprising the steps of joining together at least two layers of polyester material, a first layer being modified polyester material and being of the type which can be subjected to a stretching treatment at a temperature below 100° C. without amorphous molecular structure being wholly lost, a second layer being polyester material whose molecular structure becomes crystalline when the material is subjected to a stretching at a temperature below 100° C., and subjecting the layers so combined to a joint stretching operation at a temperature below 100° C.
Claim 3
Dependent Claim
20 words
The method according to claim 1, wherein the at least two layers are joined together by laminating the layers together.
Claim 4
Dependent Claim
19 words
The method according to claim 1, wherein the at least two layers are joined together by co-extruding the layers.
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) | 1986-09-19 | 1987-03-21 | 1987-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-19 | 1991-03-21 | 1991-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-19 | 1995-03-21 | 1995-09-20 | $7700.00 | Window Closed / Lapsed |