US4803102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple layer packaging films and packages formed therefrom
Assignee: Kendall Mcgraw Laboratories Inc
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Filing: 1987-10-27
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Granted: 1989-02-07
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Expires: 2007-10-27
Abstract
Abstract The invention discloses a multiple layer film useful in packaging, and the packages made therefrom. A first layer of the film is a material containing an ester group, a polycarbonate or a polyether block amide copolymer. A second layer of the film is a sealant, preferably polypropylene polymer blended with an elastomeric styrene ethylene butylene styrene copolymer. A third functionally adhesive layer is between the first and second layers. The composition of the third adhesive layer is typically either a polypropylene modified with a carboxy group such as an organic acid or anhydride or a styrene ethylene butylene styrene copolymer.
Inventors
- 👤 Jean E. Raniere
- 👤 Steven L. Smith
- 👤 Russell P. Gehrke
- 👤 Richard E. Johnson, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:55
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; C; C09; C09J; C09J123/00; C09J123/02; C09J123/10; C08; C08L; C08L2666/00; C08L2666/02; C08L2666/24; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/31504; Y10T428/31507; Y10T428/31725; Y10T428/31739; Y10T428/31743; Y10T428/31746; Y10T428/3175; Y10T428/31786; Y10T428/31797; Y10T428/31855
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
95 words
A multiple layer film, comprising: (a) a first layer, the composition of said first layer being selected form the group consisting of polyesters, copolyesters, polycarbonates, and polyether block amide copolymers; (b) a second sealant layer, the composition of said second layer comprising a composition of polypropylene polymer and a styrene ethylene butylene styrene copolymer; and (c) a third adhesive layer adhering said first layer to said second layer with good adhesion, said third layer being positioned between said first and second layers, the composition of said third adhesive layer being styrene ethylene butylene styrene copolymer.
Claim 2
Dependent Claim
95 words
A multiple layer film, comprising: (a) a first layer, the composition of said first layer being selected form the group consisting of polyesters, copolyesters, polycarbonates, and polyether block amide copolymers; (b) a second sealant layer, the composition of said second layer comprising a composition of polypropylene polymer and a styrene ethylene butylene styrene copolymer; and (c) a third adhesive layer adhering said first layer to said second layer with good adhesion, said third layer being positioned between said first and second layers, the composition of said third adhesive layer being styrene ethylene butylene styrene copolymer.
Claim 3
Dependent Claim
18 words
A multiple layer film as in claim 1 wherein said first layer is a polyester or copolyester polymer.
Claim 4
Dependent Claim
18 words
A multiple layer film as in claim 1 wherein said first layer is a polyether block amide copolymer.
Claim 5
Dependent Claim
17 words
A multiple layer film as in claim 1 wherein said first layer is a glycol modified cyclohexanedimethanolcyclohexanendicarboxylate.
Claim 6
Dependent Claim
49 words
A multiple layer film as in claim 1 wherein the composition of said second sealant layer comprises a blend of about 40% by weight to about 90% by weight of said polypropylene and about 60% by weight to about 10% by weight of said styrene ethylene butylene styrene copolymer.
Claim 7
Dependent Claim
11 words
A package made from a multiple layer film of claim 1.
Claim 8
Dependent Claim
11 words
A package made from a multiple layer film of claim 2.
Claim 9
Dependent Claim
11 words
A package made from a multiple layer film of claim 3.
Claim 10
Dependent Claim
11 words
A package made from a multiple layer film of claim 4.
Claim 11
Dependent Claim
11 words
A package made from a multiple layer film of claim 4.
Claim 12
Dependent Claim
27 words
A package as in claim 6, said package having been subjected to processing conditions of about 250° F. for a period of at least about 10 minutes.
Claim 13
Dependent Claim
27 words
A package as in claim 7, said package having been subjected to processing conditions of about 250° F. for a period of at least about 10 minutes.
Claim 14
Dependent Claim
27 words
A package as in claim 8, said package having been subjected to processing conditions of about 250° F. for a period of at least about 10 minutes.
Claim 15
Dependent Claim
27 words
A package as in claim 9, said package having been subjected to processing conditions of about 250° F. for a period of at least about 10 minutes.
Claim 16
Dependent Claim
27 words
A package as in claim 10, said package having been subjected to processing conditions of about 250° F. for a period of at least about 10 minutes.
Claim 17
Dependent Claim
28 words
The package as in any one of claims 6, 7, 10, 11, and 12, 15 wherein said package is adapted to contain medical products including liquids and powders.
Claim 18
Dependent Claim
28 words
A multiple layer film as in any one of claims 1 or 2, 5, said third adhesive layer being in surface-to-surface contact with said first and second layers.
Claim 19
Dependent Claim
11 words
A package made from a multiple layer film of claim 17.
Claim 20
Dependent Claim
27 words
A package as in claim 18, said package having been subjected to processing conditions of about 250° F. for a period of at least about 10 minutes.
Claim 21
Dependent Claim
19 words
A package as in claim 19 wherein said package is adapted to contain medical products including liquids and powders.
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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) | 1992-02-07 | 1992-08-08 | 1993-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-07 | 1996-08-08 | 1997-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-07 | 2000-08-08 | 2001-02-07 | $7700.00 | Window Closed / Lapsed |