Patent US5223346A successfully refreshed from Google Patents.
US5223346A
Expired / Lapsed
US
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Hdpe/polypropylene film laminates
Assignee: Mobil Oil AS
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Filing: 1991-10-23
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Granted: 1993-06-29
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Expires: 2011-10-23
Abstract
Abstract The invention relates to a laminate of layer (A) a biaxially oriented high density polyethylene film of at least 50 wt. % of the polyethylene of a density of 0.960 or greater; and layer (B) a biaxially oriented polypropylene film.
Inventors
- 👤 Pang-Chia Lu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:04
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/18; B32B27/32; B32B7/00; B32B7/04; B32B7/12; C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; B32B2307/00; B32B2307/30; B32B2307/31; B32B2307/50; B32B2307/514; B32B2307/518; B32B2307/70; B32B2307/718; B32B2323/00; B32B2323/04; B32B2323/043; C08L2205/00; C08L2205/02; C08L2205/03; C08L23/08; C08L23/0846; C08L23/0869; C08L23/0876; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/31504; Y10T428/31801; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
40 words
A film combination comprising the laminate of: Layer (A) a biaxially oriented high density polyethylene (HDPE) film comprising at least 50 wt. % of HDPE having a density of 0.960 or greater; and Layer (B) a biaxially oriented polypropylene film.
Claim 2
Dependent Claim
40 words
A film combination comprising the laminate of: Layer (A) a biaxially oriented high density polyethylene (HDPE) film comprising at least 50 wt. % of HDPE having a density of 0.960 or greater; and Layer (B) a biaxially oriented polypropylene film.
Claim 3
Dependent Claim
60 words
The combination of claim 1 wherein said HDPE comprises about 50-98 wt % of a first HDPE having a density of at least about 0.60 and a melt index of from about 0.6 to 1.2 and about 1-25 wt % of a second HDPE having a density of about 0.960 and a melt index different from a said first HDPE.
Claim 4
Dependent Claim
85 words
The combination of claim 1 wherein said HDPE comprises about 50-98 wt. % of a first HDPE having a melt index of from greater than 0.5 to about 2.0; about 1 to 25 wt. % of a second HDPE having a melt index of from about 0.1 to about 0.5; and about 1 to 25 wt. % of a third HDPE having a melt index of greater than 2 to about 8; and all of said HDPE having a density of about 0.960 or greater.
Claim 5
Dependent Claim
19 words
The combination of claim 1 wherein said HDPE film contains up to about 10 wt. % of microcrystalline wax.
Claim 6
Dependent Claim
22 words
The combination of claim 1 wherein said oriented polypropylene film has at least one skin layer of a heat sealable polymer thereon.
Claim 7
Dependent Claim
14 words
The combination of claim 1 wherein layers (A) and (B) are extrusion laminated together.
Claim 8
Dependent Claim
16 words
The combination of claim 1 wherein layers (A) and (B) are laminated together with an adhesive.
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) | 1996-06-28 | 1996-12-28 | 1997-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-28 | 2000-12-28 | 2001-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-28 | 2004-12-28 | 2005-06-29 | $7700.00 | Window Closed / Lapsed |