US4456660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coextruded two-ply laminate films of low density polyethylene and blend of polybutene-1 and polyethylene or polypropylene
Assignee: Pactiv LLC
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Filing: 1980-08-06
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Granted: 1984-06-26
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Expires: 2000-08-06
Abstract
Abstract There are provided coextruded two-ply laminate films in which one of the lamina is low density polyethylene and the other is a blend of 10-50 weight percent polybutene with 90-50 weight percent polypropylene or low density polyethylene. Such laminated films are tough and have good tear resistant.
Inventors
- 👤 Edward A. Colombo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:56
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/03; B29C48/09; B29C48/10; B29C48/14; B29C48/147; B29C48/1472; B29C48/16; B29C48/18; B29C48/21; B29C48/25; B29C48/30; B29C48/32; B29C48/335; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/32; B32B27/322; B29C2791/00; B29C2791/004; B29C2791/007; B32B2307/00; B32B2307/50; B32B2307/582; B32B2307/5825; B32B2307/70; B32B2307/718; B32B2323/00; B32B2323/04; B32B2323/046; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31917; Y10T428/31924; Y10T428/31931
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
46 words
A coextruded two-layer laminated film in which one of the lamina is low density polyethylene and the other lamina comprises a blend of between about 10 and about 50 weight percent of polybutene-1 and between about 90 and about 50 weight percent of low density polyethylene.
Claim 2
Dependent Claim
46 words
A coextruded two-layer laminated film in which one of the lamina is low density polyethylene and the other lamina comprises a blend of between about 10 and about 50 weight percent of polybutene-1 and between about 90 and about 50 weight percent of low density polyethylene.
Claim 3
Dependent Claim
23 words
The laminated film of claim 1 in which said blend contains about 50 weight percent low density polyethylene and 50 weight percent polybutene-1.
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) | 1987-06-26 | 1987-12-26 | 1988-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-26 | 1991-12-26 | 1992-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-26 | 1995-12-26 | 1996-06-26 | $7700.00 | Window Closed / Lapsed |