US4513037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayered hollow polycarbonate containers
Assignee: General Electric Co
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Filing: 1983-12-29
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Granted: 1985-04-23
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Expires: 2003-12-29
Abstract
Abstract Multilayered hollow polycarbonate containers comprised of: (i) at least one inner polycarbonate layer; (ii) at least one outer polycarbonate layer; and (iii) at least one intermediate layer between said inner polycarbonate layer and said outer polycarbonate layer comprised of a thermoplastic resin exhibiting gas-barrier properties. The containers are formed by coextrusion blow-molding.
Inventors
- 👤 Patrick C. Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:42
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/22; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/306; B32B27/36; B32B27/365; B65; B65D; B65D1/00; B65D1/22; B65D1/26; B65D1/28; B29C2949/00; B29C2949/07; B29C2949/081; B29C2949/0811; B29C2949/0819; B29C2949/082; B29C2949/0822; B29C2949/0829; B29K; B29K2069/00; B32B2307/00; B32B2307/70; B32B2307/724; B32B2307/7242; B32B2309/00; B32B2309/08; B32B2309/10; B32B2309/105; B32B2439/00; B32B2439/40; B32B2439/60; B32B2439/70; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1379; Y10T428/1383; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265; Y10T428/266; Y10T428/31504; Y10T428/31507; Y10T428/31786; Y10T428/31855; Y10T428/31935
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
68 words
A multi-layered hollow container containing at least three layers comprised of: (i) a polycarbonate inner layer comprised of at least one ply of a polycarbonate resin; (ii) a polycarbonate outer layer comprised of at least one ply of a polycarbonate resin; and (iii) an intermediate layer disposed between said inner layer and said outer layer comprised of at least one ply of a thermoplastic resin exhibiting gas-barrier properties.
Claim 2
Dependent Claim
68 words
A multi-layered hollow container containing at least three layers comprised of: (i) a polycarbonate inner layer comprised of at least one ply of a polycarbonate resin; (ii) a polycarbonate outer layer comprised of at least one ply of a polycarbonate resin; and (iii) an intermediate layer disposed between said inner layer and said outer layer comprised of at least one ply of a thermoplastic resin exhibiting gas-barrier properties.
Claim 3
Dependent Claim
20 words
The container of claim 1 wherein said inner layer and said outer layer are melt laminated to said intermediate layer.
Claim 4
Dependent Claim
23 words
The container of claim 2 wherein said intermediate layer has a thickness effective for said intermediate layer to function as a gas-barrier layer.
Claim 5
Dependent Claim
14 words
The container of claim 3 wherein said thickness is at least about 0.5 mils.
Claim 6
Dependent Claim
13 words
The container of claim 2 which is made by a coextrusion blow-molding method.
Claim 7
Dependent Claim
13 words
The container of claim 5 wherein the layers are intra die melt-laminated together.
Claim 8
Dependent Claim
25 words
The container of claim 3 wherein said intermediate layer is comprised of a resin selected from acrylonitriles, polyesters, and polymers of ethylene and vinyl alcohols.
Claim 9
Dependent Claim
25 words
The container of claim 7 wherein said polyester is a copolyester of at least one cycloaliphatic diol and at least one dibasic aromatic carboxylic acid.
Claim 10
Dependent Claim
19 words
The container of claim 8 wherein said copolyester is a copolyester of cyclohexane dimethylol and isophthalic and terephthalic acid.
Claim 11
Dependent Claim
12 words
The container of claim 9 wherein said polycarbonate is a branched polycarbonate.
Claim 12
Dependent Claim
13 words
The container of claim 10 wherein said polycarbonate is a bisphenol-A based polycarbonate.
Claim 13
Dependent Claim
14 words
The container of claim 7 wherein said thermoplastic polyester is selected from polyalkylene terephthalates.
Claim 14
Dependent Claim
12 words
The container of claim 12 wherein said polyalkylene terephthalate is polyethyelene terephthalate.
Claim 15
Dependent Claim
12 words
The container of claim 13 wherein said polycarbonate is a branched polycarbonate.
Claim 16
Dependent Claim
13 words
The container of claim 14 wherein said polycarbonate is a bisphenol-A based polycarbonate.
References Cited (Backward Citations)
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Cited
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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) | 1988-04-22 | 1988-10-22 | 1989-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-22 | 1992-10-22 | 1993-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-22 | 1996-10-22 | 1997-04-23 | $7700.00 | Window Closed / Lapsed |