Patent US4151318A successfully refreshed from Google Patents.
US4151318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminar thermoplastic film constructions
Assignee: Pactiv LLC
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Filing: 1976-06-21
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Granted: 1979-04-24
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Expires: 1996-06-21
Abstract
Abstract Laminar thermoplastic film constructions comprising a layer of low density polyethylene bonded to a layer of a dissimilar polymer or blend of polymers including high density polyethylene; blends of high density polyethylene copolymers and fractional melt index low density polyethylene; and blends of high density polyethylene with an ethylene vinyl acetate copolymer and fractional melt index low density polyethylene. Such laminates are particularly suitable for bag constructions.
Inventors
- 👤 Jeffrey D. Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:47
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/32; B32B27/06; B32B27/08; B29; B29C; B29C48/00; B29C48/001; B29C48/0013; B29C48/0015; B29C48/03; B29C48/09; B29C48/16; B29C48/18; B29C48/21; B29C48/10; B32B2270/00; B32B2307/00; B32B2307/50; B32B2307/514; B32B2323/00; B32B2323/04; B32B2323/043; B32B2323/046; B32B2439/00; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/24; Y10T428/24942; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31928
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
96 words
A laminar film structure comprising at least one layer of low density polyethylene resin and a second layer comprising a resinous blend of a member selected from the group consisting of: (a) high density polyethylene, ethylene vinyl acetate copolymer having from about 6% by weight up to about 18% by weight of vinyl acetate and low density polyethylene; (b) high density polyethylene-octene copolymer and low density polyethylene; or (c) high density polyethylene and a non-saponified ethylene vinyl acetate copolymer having a vinyl acetate content of from about 6% by weight up to about 18% by weight.
Claim 2
Dependent Claim
96 words
A laminar film structure comprising at least one layer of low density polyethylene resin and a second layer comprising a resinous blend of a member selected from the group consisting of: (a) high density polyethylene, ethylene vinyl acetate copolymer having from about 6% by weight up to about 18% by weight of vinyl acetate and low density polyethylene; (b) high density polyethylene-octene copolymer and low density polyethylene; or (c) high density polyethylene and a non-saponified ethylene vinyl acetate copolymer having a vinyl acetate content of from about 6% by weight up to about 18% by weight.
Claim 3
Dependent Claim
110 words
A laminar thermoplastic bag structure comprising at least two layers, an inner layer and an outer layer, said inner layer comprising low density polyethylene and said outer layer comprising a film formed from a resinous blend of a member selected from the group consisting of: (a) high density polyethylene, ethylene vinyl acetate copolymer having from about 6% by weight up to about 18% by weight of vinyl acetate and low density polyethylene; (b) high density polyethylene-octene copolymer and low density polyethylene; or (c) high density polyethylene and a non-saponified ethylene vinyl acetate copolymer having a vinyl acetate content of from about 6% by weight up to about 18% by weight.
Claim 4
Dependent Claim
110 words
A laminar thermoplastic bag structure comprising at least two layers, an inner layer and an outer layer, said inner layer comprising low density polyethylene and said outer layer comprising a film formed from a resinous blend of a member selected from the group consisting of: (a) high density polyethylene, ethylene vinyl acetate copolymer having from about 6% by weight up to about 18% by weight of vinyl acetate and low density polyethylene; (b) high density polyethylene-octene copolymer and low density polyethylene; or (c) high density polyethylene and a non-saponified ethylene vinyl acetate copolymer having a vinyl acetate content of from about 6% by weight up to about 18% by weight.
References Cited (Backward Citations)
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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) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |