US4322003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminate with heat-sealable polyester foil and package
Assignee: Pechiney Plastic Packaging Inc
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Filing: 1980-03-26
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Granted: 1982-03-30
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Expires: 2000-03-26
Abstract
Abstract An improved flexible package for use in packaging acids, oxidants and the like is constructed with a laminate comprising, at least, an amorphous polyester ply and a metal foil ply. The package is characterized by a superior combination of excellent stability in heatsealing operations over a wide range of conditions and extraordinary chemical resistance to oxidants and acids.
Inventors
- 👤 Florren E. Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:29
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B15/20; B32B27/00; B32B27/36; B32B2307/00; B32B2307/30; B32B2307/31; B32B2307/70; B32B2307/702; B32B2307/714; B32B2439/00; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/28; Y10T428/2804; Y10T428/2813; Y10T428/2817; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31786
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
43 words
A laminate suitable for use in forming corrosion-resistant pouches said laminate comprising a heatsealable surface formed of a heatsealable ply of non-oriented amorphous polyester film and at least one other ply, said other ply being a metal foil bonded to said heatsealable ply.
Claim 2
Dependent Claim
43 words
A laminate suitable for use in forming corrosion-resistant pouches said laminate comprising a heatsealable surface formed of a heatsealable ply of non-oriented amorphous polyester film and at least one other ply, said other ply being a metal foil bonded to said heatsealable ply.
Claim 3
Dependent Claim
23 words
A laminate as defined in claim 1 comprising 1. a printable exterior ply 2. an aluminum foil ply and 3. said polyester ply
Claim 4
Dependent Claim
43 words
A laminate as defined in claim 1 wherein said amorphous polyester is about 1 mil. thick, has an elongation of at least 300%, a secondary transition temperature below about 180 degrees F., and a tear strength of at least 30 grams or more.
Claim 5
Dependent Claim
28 words
A heatsealed, flexible-wall-type package formed of a laminate as defined in claims 1, 2 or 3 with said heatsealable polyester in contact with the contents of said package.
Claim 6
Dependent Claim
52 words
A package comprising a rigid wall construction, said wall comprising a chemically resistant surface formed of a laminate as described in claims 1, 2 or 3, wherein said heatsealable polyester is positioned to contact the contents of said package, and wherein said laminate comprises at least one heatsealed seam within said package.
Claim 7
Dependent Claim
39 words
A heatsealed, flexible-wall-type package formed of a laminate as defined in claims 1, 2 or 3 and wherein said heatsealable polyester film is in contact with the contents of said package and wherein said contents contain halogen-bearing oxidizing compounds.
Claim 8
Dependent Claim
39 words
A heatsealable, flexible-wall type package formed of a laminate as defined in claims 1, 2 or 3 and wherein said heat-sealable polyester film is in contact with the contents of such package, and wherein said contents are acidic condiments.
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) | 1985-03-29 | 1985-09-28 | 1986-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-29 | 1989-09-28 | 1990-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-29 | 1993-09-28 | 1994-03-30 | $7700.00 | Window Closed / Lapsed |