US4107362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayered container
Assignee: National Can Corp
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Filing: 1977-06-27
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Granted: 1978-08-15
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Expires: 1997-06-27
Abstract
Abstract A multilayered hollow plastic container having improved resistance to permeation by unwanted gases, especially injection blow molded containers having a preformed inner lining which is applied to a core prior to the formation of the composite parison. One layer is a barrier plastic having substantial but incomplete resistance to gas permeation, and another layer contains a getter material capable of binding unwanted gas uniformly dispersed throughout.
Inventors
- 👤 Emery I. Valyi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:51
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B29; B29C; B29C49/00; B29C49/22; B29C51/00; B29C51/14; B32B1/00; B32B27/30; B32B27/302; B32B27/32; B65; B65D; B65D1/00; B65D1/22; B65D1/26; B65D1/28; B29C2949/00; B29C2949/30; B29C2949/3008; B29C2949/3012; B29C2949/3016; B29C2949/302; B29C2949/3024; B29C2949/3026; B29C2949/3028; B29C2949/3064; B29C2949/3066; B32B2325/00; B32B2367/00; B32B2439/00; B32B2439/40; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1379; Y10T428/1383; Y10T428/24; Y10T428/24942; Y10T428/31504; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/3188; Y10T428/31884; Y10T428/31888; Y10T428/31891; Y10T428/31895; Y10T428/31899; Y10T428/31902; Y10T428/31906; Y10T428/31909; Y10T428/31913; Y10T428/3192; Y10T428/31928; Y10T428/31935
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
114 words
A seamless multilayered hollow plastic container having improved resistance to gas permeation comprising: an inner first plastic carrier layer containing an effective amount of a uniformly distributed getter material capable of binding unwanted gas; a second intermediate barrier plastic layer adjacent said first layer, said barrier layer having substantial but incomplete resistance to gas permeation; and a third pressure molded outer plastic layer adjacent said second layer, said layers being adhered one to adjacent layers substantially over their entire contacting areas, wherein said container has a bottom and side walls integral therewith and extending therefrom terminating in an open mouth suitable for being closed by a cover having improved resistance to unwanted gas permeation.
Claim 2
Dependent Claim
114 words
A seamless multilayered hollow plastic container having improved resistance to gas permeation comprising: an inner first plastic carrier layer containing an effective amount of a uniformly distributed getter material capable of binding unwanted gas; a second intermediate barrier plastic layer adjacent said first layer, said barrier layer having substantial but incomplete resistance to gas permeation; and a third pressure molded outer plastic layer adjacent said second layer, said layers being adhered one to adjacent layers substantially over their entire contacting areas, wherein said container has a bottom and side walls integral therewith and extending therefrom terminating in an open mouth suitable for being closed by a cover having improved resistance to unwanted gas permeation.
Claim 3
Dependent Claim
35 words
A container according to claim 1 wherein said barrier has substantial but incomplete resistance to gas permeation and wherein said getter is capable of binding substantially all of the unwanted gas permeating through said barrier.
Claim 4
Dependent Claim
8 words
A blow molded container according to claim 1.
Claim 5
Dependent Claim
12 words
A container according to claim 1 wherein said getter is an antioxidant.
Claim 6
Dependent Claim
13 words
A container according to claim 1 including a plurality of said barrier layers.
Claim 7
Dependent Claim
27 words
A container according to claim 1 wherein the barrier layer is selected from the group consisting of acrylonitrile-containing polymers, terephthalic polyesters, polyethylene terephthalates, polyvinylidene dichloride, and elastomers.
Claim 8
Dependent Claim
20 words
A container according to claim 1 wherein said carrier layer is selected from the group consisting of polyolefins and polystyrene.
Claim 9
Dependent Claim
12 words
A container according to claim 1 wherein said getter is propyl gallate.
Claim 10
Dependent Claim
20 words
A container according to claim 1 wherein the carrier is the innermost layer and the pressure molded layer is outermost.
Claim 11
Dependent Claim
40 words
A container according to claim 1 wherein the first and second layers comprise a previously formed sleeve-like liner, the outer layer is injected therearound to form a composite, and the composite is expanded together into conformity with a blow mold.
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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) | 1981-08-14 | 1982-02-13 | 1982-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-14 | 1986-02-13 | 1986-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-14 | 1990-02-13 | 1990-08-15 | $7700.00 | Window Closed / Lapsed |