Patent US4778697A successfully refreshed from Google Patents.
US4778697A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric films
Assignee: Baxter International Inc
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Filing: 1985-11-29
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Granted: 1988-10-18
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Expires: 2005-11-29
Abstract
Abstract This invention pertains to the use of polymer blends in making multiple layer films. In some layers, the elastomer or ethylene-based copolymer is blended with polypropylene, and in some layers, with polyethylene. Typical films have two to five layers. In multilayer films, at least one layer of a blend of polyethylene, preferably high density polyethylene, with elastomer and/or ethylene-based copolymers. Another layer is polypropylene blended with elastomers and/or ethylene-based copolymers. The films may have as few as two layers, one each having polypropylene and polyethylene, preferably high density polyethylene. Additional layers may be added to the two or three layer films taught herein, for variety of purposes.
Inventors
- 👤 Roger P. Genske
- 👤 Yong J. Kim
- 👤 Russell P. Gehrke
- 👤 Richard E. Johnson, Jr.
- 👤 R. Daniel Webster
- 👤 Leonard F. Czuba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:20
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/32; B29; B29C; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/16; B29C48/18; B29C48/185; B32B27/06; B32B27/08; B32B27/18; C; C08; C08L; C08L23/00; C08L23/02; C08L23/04; C08L23/06; C08L23/08; C08L23/0807; C08L23/0815; C08L23/10; C08L23/12; C08L23/14; C08L23/142; C08L23/16; C08L53/00; B32B2270/00; B32B2323/00; B32B2323/04; B32B2323/043; B32B2439/00; B32B2439/40; B32B2439/80; B32B2553/00; C08L2205/00; C08L2205/02; C08L2205/03; C08L23/18; C08L23/20; C08L23/22; C08L25/00; C08L25/02; C08L25/16; C08L53/02; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/2852; Y10T428/2878; Y10T428/2883; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 67
Claim 1
Independent Claim
127 words
A multiple layer film comprising: (a) a first layer, the composition of said first layer being a blend of (i) polypropylene, (ii) a second component, said second component providing elastomeric properties, and being selected from the group consisting of ethylene butene-1 copolymers and ethylene propylene copolymers, and (iii) a third component, the composition of said third component being a modifier having elastomeric properties the composition of said third component being different from the composition of said second component; and (b) a second layer having two surfaces, and being adhered, on one of said surfaces to said first layer, the composition of said second layer being a blend of (i) polyethylene and (ii) a second component, said second component being a modifier providing elastomeric properties representative of elastomers.
Claim 2
Dependent Claim
127 words
A multiple layer film comprising: (a) a first layer, the composition of said first layer being a blend of (i) polypropylene, (ii) a second component, said second component providing elastomeric properties, and being selected from the group consisting of ethylene butene-1 copolymers and ethylene propylene copolymers, and (iii) a third component, the composition of said third component being a modifier having elastomeric properties the composition of said third component being different from the composition of said second component; and (b) a second layer having two surfaces, and being adhered, on one of said surfaces to said first layer, the composition of said second layer being a blend of (i) polyethylene and (ii) a second component, said second component being a modifier providing elastomeric properties representative of elastomers.
Claim 3
Dependent Claim
29 words
A multiple layer film as in claim 1 wherein said first component in said first layer is present in an amount of about 40% to about 70% by weight.
Claim 4
Dependent Claim
70 words
A multiple layer film as in claim 1 wherein said second component in said first layer consists essentially of an ethylene copolymerized with moieties of a second molecule, said copolymer being about 10 to about 95 mole percent ethylene and about 90 to about 5 mole percent of said moieties of said second molecule, the composition of said second molecule being selected from the group consisting of propylene and butene-1.
Claim 5
Dependent Claim
70 words
A multiple layer film as in claim 2 wherein said second component in said first layer consists essentially of an ethylene copolymerized with moieties of a second molecule, said copolymer being about 10 to about 95 mole percent ethylene and about 90 to about 5 mole percent of said moieties of said second molecule, the composition of said second molecule being selected from the group consisting of propylene and butene-1.
Claim 6
Dependent Claim
33 words
A multiple layer film as in claim 1 wherein said second componentof said first layer is about 85 to about 95 mole percent ethylene and about 15 to about 5 mole percent butene-1.
Claim 7
Dependent Claim
34 words
A multiple layer film as in claim 2 wherein said second component of said first layer is about 85 to about 95 mole percent ethylene and about 15 to about 5 mole percent butene-1.
Claim 8
Dependent Claim
34 words
A multiple layer film as in claim 1 wherein said second component of said first layer is about 50 to about 70 mole percent ethylene and about 50 to about 30 mole percent propylene.
Claim 9
Dependent Claim
34 words
A multiple layer film as in claim 2 wherein said second component of said first layer is about 50 to about 70 mole percent ethylene and about 50 to about 30 mole percent propylene.
Claim 10
Dependent Claim
29 words
A multiple layer film as in claim 1 wherein said second component in said first layer is present in an amount of about 10% to about 40% by weight.
Claim 11
Dependent Claim
29 words
A multiple layer film as in claim 2 wherein said second component in said first layer is present in an amount of about 10% to about 40% by weight.
Claim 12
Dependent Claim
29 words
A multiple layer film as in claim 3 wherein said second component in said first layer is present in an amount of about 10% to about 40% by weight.
Claim 13
Dependent Claim
29 words
A multiple layer film as in claim 2 wherein said second component in said first layer is present in an amount of about 10% to about 40% by weight.
Claim 14
Dependent Claim
29 words
A multiple layer film as in claim 1 wherein said third component in said first layer is present in an amount of about 5% to about 35% by weight.
Claim 15
Dependent Claim
29 words
A multiple layer film as in claim 2 wherein said third component in said first layer is present in an amount of about 5% to about 35% by weight.
Claim 16
Dependent Claim
29 words
A multiple layer film as in claim 3 wherein said third component in said first layer is present in an amount of about 5% to about 35% by weight.
Claim 17
Dependent Claim
29 words
A multiple layer film as in claim 5 wherein said third component in said first layer is present in an amount of about 5% to about 35% by weight.
Claim 18
Dependent Claim
29 words
A multiple layer film as in claim 7 wherein said third component in said first layer is present in an amount of about 5% to about 35% by weight.
Claim 19
Dependent Claim
29 words
A multiple layer film as in claim 12 wherein said third component in said first layer is present in an amount of about 5% to about 35% by weight.
Claim 20
Dependent Claim
28 words
A multiple layer film as in claim 1 wherein said polyethylene in said second layer is present in an amount of about 50% to about 95% by weight.
Claim 21
Dependent Claim
28 words
A multiple layer film as in claim 2 wherein said polyethylene in said second layer is present in an amount of about 50% to about 95% by weight.
Claim 22
Dependent Claim
28 words
A multiple layer film as in claim 5 wherein said polyethylene in said second layer is present in an amount of about 50% to about 95% by weight.
Claim 23
Dependent Claim
28 words
A multiple layer film as in claim 7 wherein said polyethylene in said second layer is present in an amount of about 50% to about 95% by weight.
Claim 24
Dependent Claim
28 words
A multiple layer film as in claim 9 wherein said polyethylene in said second layer is present in an amount of about 50% to about 95% by weight.
Claim 25
Dependent Claim
28 words
A multiple layer film as in claim 12 wherein said polyethylene in said second layer is present in an amount of about 50% to about 95% by weight.
Claim 26
Dependent Claim
29 words
A multiple layer film as in claim 1 wherein said second component in said second layer is present in an amount of about 5% to about 35% by weight.
Claim 27
Dependent Claim
29 words
A multiple layer film as in claim 2 wherein said second component in said second layer is present in an amount of about 5% to about 35% by weight.
Claim 28
Dependent Claim
29 words
A multiple layer film as in claim 5 wherein said second component in said second layer is present in an amount of about 5% to about 35% by weight.
Claim 29
Dependent Claim
29 words
A multiple layer film as in claim 7 wherein said second component in said second layer is present in an amount of about 5% to about 35% by weight.
Claim 30
Dependent Claim
29 words
A multiple layer film as in claim 9 wherein said second component in said second layer is present in an amount of about 5% to about 35% by weight.
Claim 31
Dependent Claim
29 words
A multiple layer film as in claim 19 wherein said second component in said second layer is present in an amount of about 5% to about 35% by weight.
Claim 32
Dependent Claim
29 words
A multiple layer film as in claim 24 wherein said second component in said second layer is present in an amount of about 5% to about 35% by weight.
Claim 33
Dependent Claim
61 words
A multiple layer film as in claim 1 and including, in said blend composition of said second layer, about 2% to about 50% by weight of a third component, said third component being a modifier having elastomeric properties, the composition of said third component in said second layer being different from the composition of said second component in said second layer.
Claim 34
Dependent Claim
61 words
A multiple layer film as in claim 5 and including, in said blend composition of said second layer, about 2% to about 50% by weight of a third component, said third component being a modifier having elastomeric properties, the composition of said third component in said second layer being different from the composition of said second component in said second layer.
Claim 35
Dependent Claim
61 words
A multiple layer film as in claim 9 and including, in said blend composition of said second layer, about 2% to about 50% by weight of a third component, said third component being a modifier having elastomeric properties, the composition of said third component in said second layer being different from the composition of said second component in said second layer.
Claim 36
Dependent Claim
61 words
A multiple layer film as in claim 13 and including, in said blend composition of said second layer, about 2% to about 50% by weight of a third component, said third component being a modifier having elastomeric properties, the composition of said third component in said second layer being different from the composition of said second component in said second layer.
Claim 37
Dependent Claim
61 words
A multiple layer film as in claim 19 and including, in said blend composition of said second layer, about 2% to about 50% by weight of a third component, said third components being a modifier having elastomeric properties, the composition of said third component in said second layer being different from the composition of said second component in said second layer.
Claim 38
Dependent Claim
61 words
A multiple layer film as in claim 21 and including, in said blend compsoition of said second layer, about 2% to about 50% by weight of a third component, said third component being a modifier having elastomeric properties, the composition of said third component in said second layer being different from the composition of said second component in said second layer.
Claim 39
Dependent Claim
61 words
A multiple layer film as in claim 23 and including, in said blend composition of said second layer, about 2% to about 50% by weight of a third component, said third component being a modifier having elastomeric properties, the composition of said third component in said second layer being different from the composition of said second component in said second layer.
Claim 40
Dependent Claim
61 words
A multiple layer film as in claim 26 and including, in said blend composition of said second layer, about 2% to about 50% by weight of a third component, said third component being a modifier having elastomeric properties, the composition of said third component in said second layer being different from the composition of said second component in said second layer.
Claim 41
Dependent Claim
61 words
A multiple layer film as in claim 30 and including, in said blend composition of said second layer, about 2% to about 50% by weight of a third component, said third component being a modifier having elastomeric properties, the composition of said third component in said second layer being different from the composition of said second component in said second layer.
Claim 42
Dependent Claim
49 words
A multiple layer film as in claim 1 and including a third layer adhered on the other said surface of said second layer, the composition of said third layer being a blend of (i) polypropylene and (ii) a second component, said second component being a modifier having elastomeric properties.
Claim 43
Dependent Claim
49 words
A multiple layer film as in claim 2 and including a third layer adhered on the other said surface of said second layer, the composition of said third layer being a blend of (i) polypropylene and (ii) a second component, said second component being a modifier having elastomeric properties.
Claim 44
Dependent Claim
49 words
A multiple layer film as in claim 12 and including a third layer adhered on the other said surface of said second layer, the composition of said third layer being a blend of (i) polypropylene and (ii) a second component, said second component being a modifier having elastomeric properties.
Claim 45
Dependent Claim
49 words
A multiple layer film as in claim 18 and including a third layer adhered on the other said surface of said second layer, the composition of said third layer being a blend of (i) polypropylene and (ii) a second component, said second component being a modifier having elastomeric properties.
Claim 46
Dependent Claim
49 words
A multiple layer film as in claim 19 and including a third layer adhered on the other said surface of said second layer, the composition of said third layer being a blend of (i) polypropylene and (ii) a second component, said second component being a modifier having elastomeric properties.
Claim 47
Dependent Claim
49 words
A multiple layer film as in claim 25 and including a third layer adhered on the other said surface of said second layer, the composition of said third layer being a blend of (i) polypropylene and (ii) a second component, said second component being a modifier having elastomeric properties.
Claim 48
Dependent Claim
49 words
A multiple layer film as in claim 27 and including a third layer adhered on the other said surface of said second layer, the composition of said third layer being a blend of (i) polypropylene and (ii) a second component, said second component being a modifier having elastomeric properties.
Claim 49
Dependent Claim
49 words
A multiple layer film as in claim 37 and including a third layer adhered on the other said surface of said second layer, the composition of said third layer being a blend of (i) polypropylene and (ii) a second component, said second component being a modifier having elastomeric properties.
Claim 50
Dependent Claim
39 words
A multiple layer film as in claim 41 and including, in said blend composition of said third layer, a third component, said third component being a modifier having elastomeric properties, said third component being different from said second component.
Claim 51
Dependent Claim
39 words
A multiple layer film as in claim 42 and including, in said blend composition of said third layer, a third component, said third component being a modifier having elastomeric properties, said third component being different from said second component.
Claim 52
Dependent Claim
39 words
A multiple layer film as in claim 43 and including, in said blend composition of said third layer, a third component, said third component being a modifier having elastomeric properties, said third component being different from said second component.
Claim 53
Dependent Claim
39 words
A multiple layer film as in claim 44 and including, in said blend composition of said third layer, a third component, said third component being a modifier having elastomeric properties, said third component being different from said second component.
Claim 54
Dependent Claim
39 words
A multiple layer film as in claim 45 and including in said blend composition of said third layer, a third component, said third component being a modifier having elastomeric properties, said third component being different from said second component.
Claim 55
Dependent Claim
39 words
A multiple layer film as in claim 46 and including, in said blend composition of said third layer, a third component, said third component being a modifier having elastomeric properties, said third component being different from said second component.
Claim 56
Dependent Claim
39 words
A multiple layer film as in claim 47 and including, in said blend composition of said third layer, a third component, said third component being a modifier having elastomeric properties, said third component being different from said second component.
Claim 57
Dependent Claim
39 words
A multiple layer film as in claim 48 and including, in said blend composition of said third layer, a third component, said third component being a modifier having elastomeric properties, said third component being different from said second component.
Claim 58
Dependent Claim
41 words
The invention of claim 41 wherein a fourth layer in adhered to said third layer, the composition of said fourth layer being a blend of (i) polyethylene and (ii) a second component, said second component being a modifier having elastomeric properties.
Claim 59
Dependent Claim
41 words
The invention of claim 57 wherein a fifth layer is adhered to said fourth layer, the composition of said fifth layer being a blend of (i) polypropylene and (ii) a second component, said second component being a modifier having elastomeric properties.
Claim 60
Dependent Claim
35 words
The invention of claim 57 wherein said blend of said fourth layer includes a third component, said third component being a modifier having elastomeric properties, the compositions of said second and third components being different.
Claim 61
Dependent Claim
35 words
The invention of claim 58 wherein said blend of said fifth layer includes a third component, said third component being a modifier having elastomeric properties, the compositions of said second and third components being different.
Claim 62
Dependent Claim
39 words
The invention of any one of claims 1-40 wherein said first layer comprises approximately 60% of the total thickness of the combination of the first and second layers, and said second layer comprises approximately 40% of said total thickness.
Claim 63
Dependent Claim
45 words
The invention of any one of claims 41-56 wherein said first layer comprises approximately 60% of the total thickness of said three layer film, the second layer comprises approximately 20% of said total thickness and the third layer comprises approximately 20% of said total thickness.
Claim 64
Dependent Claim
22 words
The invention of claim 59 or 60 wherein the first layer comprises approximately 60% of the total thickness of the multi-layer film.
Claim 65
Dependent Claim
15 words
The invention of any one of claims 1-60 wherein said polyethylene is high density polyethylene.
Claim 66
Dependent Claim
14 words
A package made from a multiple layer film of any one of claims 1-60.
Claim 67
Dependent Claim
27 words
A flexible container capable of housing a medical product to be maintained and extracted under sterile conditions made from a film of any one of claims 1-60.
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) | 1991-10-18 | 1992-04-18 | 1992-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-18 | 1996-04-18 | 1996-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-18 | 2000-04-18 | 2000-10-18 | $7700.00 | Window Closed / Lapsed |