Patent EP0199457A1 successfully refreshed from Google Patents.
US4629658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyolefin compositions and laminated article
Assignee: El Paso Products Co
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Filing: 1986-06-06
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Granted: 1986-12-16
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Expires: 2006-06-06
Abstract
Abstract Blends of propylene polymer, ethylene-vinyl acetate copolymer and optionally a synthetic rubber, with small amounts of a polyterpene resin as a compatabilizer, possess excellent properties for the manufacture of heat-sealable and sterilizable films as well as for the manufacture of molded speciality sealed containers and bottles.
Inventors
- 👤 Bennie M. Lucas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:15
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/12; C08L23/04; C08L23/08; C08L23/0846; C08L23/0853; C08L23/14; C08L23/142; C08L23/18; C08L23/20; C08L23/22; C08L2205/00; C08L2205/03; C08L2205/035; C08L45/00; C08L57/00; C08L57/02; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/1345; Y10T428/1352; Y10T428/1386; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31928
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
129 words
A composite film comprising a first layer produced from a resin comprised of: (a) from about 10 to about 50 wt % of a propylene polymer selected from the group consisting of propylene homopolymer, a random copolymer of propylene and ethylene containing from about 0.5 to about 6 wt % polymerized ethylene, or a mixture of said homopolymer or copolymer; (b) from about 10 to about 60 wt % of an ethylene-vinyl acetate copolymer; (c) from about 10 to about 60 wt % of a synthetic rubber; and (d) from about 0.01 to about 1.5 wt % based on the total weight of (a), (b) and (c) of a polyterpene resin, and a second layer conextruded with the first layer and comprised of the propylene polymer of component (a).
Claim 2
Dependent Claim
129 words
A composite film comprising a first layer produced from a resin comprised of: (a) from about 10 to about 50 wt % of a propylene polymer selected from the group consisting of propylene homopolymer, a random copolymer of propylene and ethylene containing from about 0.5 to about 6 wt % polymerized ethylene, or a mixture of said homopolymer or copolymer; (b) from about 10 to about 60 wt % of an ethylene-vinyl acetate copolymer; (c) from about 10 to about 60 wt % of a synthetic rubber; and (d) from about 0.01 to about 1.5 wt % based on the total weight of (a), (b) and (c) of a polyterpene resin, and a second layer conextruded with the first layer and comprised of the propylene polymer of component (a).
Claim 3
Dependent Claim
49 words
The composite film of claim 1 wherein component (a) ranges from about 15 to about 35 wt %; component (b) from about 30 to about 50 wt %; component (c) from about 30 to about 50 wt % and component (d) from about 0.1 to about 1 wt %.
Claim 4
Dependent Claim
37 words
The composite film of claim 2 further comprising a third layer of the resin of component (a) coextruded with the first and second layers and positioned to enclose the first layer between said second and third layers.
Claim 5
Dependent Claim
37 words
The composite film of claim 1 further comprising a third layer of the resin of component (a) coextruded with the first and second layers and positioned to enclose the first layer between said second and third layers.
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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) | 1989-12-15 | 1990-06-16 | 1990-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-15 | 1994-06-16 | 1994-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-15 | 1998-06-16 | 1998-12-16 | $7700.00 | Window Closed / Lapsed |