Patent US2164641A successfully refreshed from Google Patents.
Patent US4401256A successfully refreshed from Google Patents.
US4401256A
Expired / Lapsed
US
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Laminar thermoplastic films, bags thereof
Assignee: Mobil Oil AS
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Filing: 1981-12-10
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Granted: 1983-08-30
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Expires: 2001-12-10
Abstract
Abstract A heat sealable film laminate having a first layer of a major amount of high density polyolefin, a minor proportion of an adhesion promoting ionomer and a heat seal promoting proportion of a metal salt of a fatty acid; and a second layer adhering to the first layer, said layer comprising a polyamide. A food storage and heating bag formed from said laminate and a method of heat sealing said laminate.
Inventors
- 👤 Donald J. Krieg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:02
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/32; B65; B65D; B65D31/00; B65D31/02; B65D81/00; B65D81/34; B32B2323/00; B32B2323/04; B32B2323/043; B32B2377/00; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/31504; Y10T428/31725; Y10T428/31739; Y10T428/31743; Y10T428/31746; Y10T428/31855; Y10T428/31938
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
55 words
A heat sealable film laminate comprising a first layer comprising a major amount of a high density polyolefin, a minor amount of an adhesion promoting ionomer and a heat seal promoting proportion of a metal salt of a fatty acid; and a second layer adhering to said first layer, said second layer comprising a polyamide.
Claim 2
Dependent Claim
55 words
A heat sealable film laminate comprising a first layer comprising a major amount of a high density polyolefin, a minor amount of an adhesion promoting ionomer and a heat seal promoting proportion of a metal salt of a fatty acid; and a second layer adhering to said first layer, said second layer comprising a polyamide.
Claim 3
Dependent Claim
45 words
The laminate of claim 1 wherein said polyolefin is a polyethylene polymer having a density of from about 0.930 to about 0.960 g/cc, said minor amount is from about 5% to about 25% by weight of said first layer and said polyamide is a nylon.
Claim 4
Dependent Claim
27 words
The laminate of claim 2 wherein said polyethylene polymer is a copolymer of ethylene and less than 10% by weight of an alpha-olefin based on said copolymer.
Claim 5
Dependent Claim
17 words
The laminate of claim 3 wherein the alpha-olefin has from about 3 to about 10 carbon atoms.
Claim 6
Dependent Claim
23 words
The laminate of claim 4 wherein the alpha-olefin is a member selected from the group consisting of 1-butene; 1-hexene, 2-ethyl; 1-hexene and 1-octene.
Claim 7
Dependent Claim
40 words
The laminate of claim 1 wherein said metal salt of a fatty acid is at least one member selected from the group consisting of alkali metal, alkaline earth metal and zinc salts of a C 12 -C 18 fatty acid.
Claim 8
Dependent Claim
30 words
The laminate of claim 6 wherein said metal salt is a member selected from the group consisting of calcium and zinc salts of a C 12 -C 18 fatty acid.
Claim 9
Dependent Claim
21 words
The laminate of claim 7 wherein said salt is a member selected from the group consisting of calcium and zinc stearate.
Claim 10
Dependent Claim
11 words
The laminate of claim 7 wherein said salt is calcium stearate.
Claim 11
Dependent Claim
24 words
The laminate of claim 1 wherein said adhesion promoting proportion is from about 1000 to about 7500 parts per million of said first layer.
Claim 12
Dependent Claim
24 words
The laminate of claim 10 wherein said adhesion promoting proportion is from about 1500 to about 5000 parts per million of said first layer.
Claim 13
Dependent Claim
20 words
The laminate of claim 11 wherein said adhesion promoting proportion is about 2000 parts per million of said first layer.
Claim 14
Dependent Claim
49 words
The laminate of claim 1 wherein said polyolefin is a copolymer of ethylene and a member selected from the group consisting of 1-butene; 1-hexene, 2-ethyl; 1-hexene and 1-octene; said ionomer is a metal-containing ionic copolymer of an olefin and an ethylenically unsaturated monocarboxylic acid; and said polyamide is nylon-6.
Claim 15
Dependent Claim
90 words
A laminar thermoplastic bag, particularly suited for the containment of foodstuffs to be heated to a preparation temperature, which comprises a first layer comprising a major amount of a high density polyolefin, a minor amount of an adhesion promoting ionomer and a heat seal promoting proportion of a metal salt of a fatty acid; a second layer adhering to said first layer and comprising a polyamide; and wherein said bag includes a heat seal between contacted faces of said first layer along at least one edge region of said bag.
Claim 16
Dependent Claim
90 words
A laminar thermoplastic bag, particularly suited for the containment of foodstuffs to be heated to a preparation temperature, which comprises a first layer comprising a major amount of a high density polyolefin, a minor amount of an adhesion promoting ionomer and a heat seal promoting proportion of a metal salt of a fatty acid; a second layer adhering to said first layer and comprising a polyamide; and wherein said bag includes a heat seal between contacted faces of said first layer along at least one edge region of said bag.
Claim 17
Dependent Claim
41 words
The bag of claim 14 wherein said polyolefin is a polyethylene polymer having a density of from about 0.930 to about 0.960 g/cc, said minor amount is from about 5% to about 25% by weight and said polyamide is a nylon.
Claim 18
Dependent Claim
27 words
The bag of claim 15 wherein said polyethylene polymer is a copolymer of ethylene and less than 10% by weight of an alpha-olefin based on said polymer.
Claim 19
Dependent Claim
17 words
The bag of claim 16 wherein the alpha-olefin has from about 3 to about 10 carbon atoms.
Claim 20
Dependent Claim
23 words
The bag of claim 17 wherein said alpha-olefin is a member selected from the group consisting of 1-butene; 1-hexene; 2-ethyl; 1-hexene and 1-octene.
Claim 21
Dependent Claim
40 words
The bag of claim 14 wherein said metal salt of a fatty acid is at least one member selected from the group consisting of alkali metal, alkaline earth metal and zinc salts of a C 12 -C 18 fatty acid.
Claim 22
Dependent Claim
30 words
The bag of claim 19 wherein said metal salt is a member selected from the group consisting of calcium and zinc salts of a C 12 -C 18 fatty acid.
Claim 23
Dependent Claim
21 words
The bag of claim 20 wherein said salt is a member selected from the group consisting of calcium and zinc stearate.
Claim 24
Dependent Claim
11 words
The bag of claim 21 wherein said salt is calcium stearate.
Claim 25
Dependent Claim
24 words
The bag of claim 14 wherein said adhesion promoting proportion is from about 1000 to about 7500 parts per million of said first layer.
Claim 26
Dependent Claim
22 words
The bag of claim 23 wherein said proportion is from about 1500 to about 5000 parts per million of said first layer.
Claim 27
Dependent Claim
18 words
The bag of claim 24 wherein said proportion is about 2000 parts per million of said first layer.
Claim 28
Dependent Claim
50 words
The bag of claim 14 wherein said polyolefin is a copolymer of ethylene and a member selected from the group consisting of 1-butene; 1-hexene, 2-ethyl; 1-hexene and 1-octene; said ionomer is a metal-containing ionic copolymer of an olefin and an ethylenically unsaturated monocarboxylic acid; and said polyamide is a nylon.
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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) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |