Patent US6094889A successfully refreshed from Google Patents.
US6094889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of form and seal packaging
Assignee: ExxonMobil Chemical Patents Inc
•
Filing: 1997-02-25
•
Granted: 2000-08-01
•
Expires: 2017-02-25
Abstract
Abstract A film having a polypropylene surface layer and a polyethylene surface layer is used in fill and seal packaging applications, in which the polyethylene layer consists essentially of a ethylene copolymer having a narrow molecular weight distribution ethylene and a CBDI of greater than 50%. The package is formed by heat sealing the polyethylene surface to the polypropylene surface of the film to form a transverse seal.
Inventors
- 👤 Achiel Josephus Van Loon
- 👤 Fiona Donald
- 👤 Patrick Henk Espeel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:59
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/16; C08J; C08J5/00; C08J5/18; B; B32; B32B; B32B27/00; B32B27/32; B32B27/322; C08K; C08K5/00; C08K5/16; C08K5/20; C08L23/04; C08L23/08; C08L23/0807; C08L23/0815; C08J2323/00; C08J2323/02; C08J2323/04; C08J2323/08; C08J2323/10; C08L2205/00; C08L2205/02; C08L23/10; C08L2314/00; C08L2314/06; C08L2555/00; C08L2555/40; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
106 words
A form fill and seal process using a film, said process comprising: a) selecting a first surface polyethylene layer for said film (A), where said polyethylene layer consists essentially of a copolymer of ethylene and up to 50 weight % of a C 3 -C 20 alpha-olefin having a CDBI of 50% or more; and b) selecting a second surface polypropylene layer for said film (B), where said polypropylene is a homopolymer of propylene or a copolymer of propylene and up to 50 weight % of a comonomer; wherein a transverse seal is made by sealing said polyethylene layer to said polypropylene layer or vice versa.
Claim 2
Dependent Claim
106 words
A form fill and seal process using a film, said process comprising: a) selecting a first surface polyethylene layer for said film (A), where said polyethylene layer consists essentially of a copolymer of ethylene and up to 50 weight % of a C 3 -C 20 alpha-olefin having a CDBI of 50% or more; and b) selecting a second surface polypropylene layer for said film (B), where said polypropylene is a homopolymer of propylene or a copolymer of propylene and up to 50 weight % of a comonomer; wherein a transverse seal is made by sealing said polyethylene layer to said polypropylene layer or vice versa.
Claim 3
Dependent Claim
42 words
The form fill and seal process of claim 1 wherein said polyethylene has an Mw/Mn of 3 or less and a CDBI of 60% or greater, and wherein said polypropylene is copolymerized with ethylene and/or a C 4 to C 20 olefin.
Claim 4
Dependent Claim
52 words
The form fill and seal process of claim 1 wherein said polyethylene has an Mw/Mn of between 1 and 2.5 and a density of between 0.88 g/cm 3 and 0.96 g/cm 3 , and wherein said polypropylene is copolymerized with ethylene, where said ethylene is present from 1 to 6 weight %.
Claim 5
Dependent Claim
13 words
The process of claim 1 further comprising forming a bag from said film.
Claim 6
Dependent Claim
13 words
The process of claim 1 further comprising packaging an article with said film.
Claim 7
Dependent Claim
14 words
The process of claim 5 wherein said article is one of nuts or candy.
References Cited (Backward Citations)
WO1992014784A2
Cited
US5358792A
Cited
US5206075A
Cited
US5530065A
Cited
WO1994006857A1
Cited
US5376439A
Cited
US5482770A
Cited
EP0597502A2
Cited
US5322726A
Cited
US5424362A
Cited
WO1994025271A1
Cited
WO1994026816A1
Cited
WO1995000333A1
Cited
US5397613A
Cited
WO1995013321A1
Cited
WO1995015851A1
Cited
WO1995016729A1
Cited
WO1995021743A1
Cited
WO1997028960A2
Cited
WO1997044178A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-08-01 | 2004-01-31 | 2004-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-08-01 | 2008-01-31 | 2008-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-08-01 | 2012-01-31 | 2012-08-01 | $7700.00 | Window Closed / Lapsed |