Patent US4015033A successfully refreshed from Google Patents.
US4015033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminates of acrylonitrile/styrene copolymers
Assignee: Imperial Chemical Industries Ltd
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Filing: 1975-03-06
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Granted: 1977-03-29
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Expires: 1995-03-06
Abstract
Abstract A laminate for packaging formed from at least two different thermoplastic polymers, one of which comprises a homogeneous copolymer of acrylonitrile and at least one aromatic olefine (the molar concentration of units of acrylonitrile to units of aromatic olefine being within the range 86% to 93%.
Inventors
- 👤 Eric Nield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:33
CPC Classifications
B; B65; B65D; B65D1/00; B65D1/02; B65D1/0207; B65D1/0215; B29; B29C; B29C49/00; B29C49/22; B32; B32B; B32B27/00; B29C2949/00; B29C2949/07; B29C2949/081; B29C2949/0811; B29C2949/0819; B32B2272/00; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31928; Y10T428/31935; Y10T428/31938
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
74 words
A process for making a thick-walled laminated tube for blow-forming into a laminated moulded container which comprises the step of simultaneously melt extruding i. a thermoplastic polymer comprising a homogeneous copolymer of acrylonitrile in a molar unit concentration of from 86% to 90% and styrene, with ii. another thermoplastic polymer, so as to produce a laminated moulded container said polymers being melt-extruded into a tubular laminate suitable for blow-forming into a laminated moulded container.
Claim 2
Dependent Claim
74 words
A process for making a thick-walled laminated tube for blow-forming into a laminated moulded container which comprises the step of simultaneously melt extruding i. a thermoplastic polymer comprising a homogeneous copolymer of acrylonitrile in a molar unit concentration of from 86% to 90% and styrene, with ii. another thermoplastic polymer, so as to produce a laminated moulded container said polymers being melt-extruded into a tubular laminate suitable for blow-forming into a laminated moulded container.
Claim 3
Dependent Claim
38 words
A process according to claim 1 in which the homogeneous copolymer is used as a blend with a compatible graft copolymer having a diene rubber substrate, the rubber content of the blend being less than 50% by weight.
Claim 4
Dependent Claim
22 words
A process according to claim 2 in which the rubber content of the blend used is between 5 and 15% by weight.
Claim 5
Dependent Claim
15 words
A process according to claim 1 in which one of the polymers melt-extruded is polyethylene.
Claim 6
Dependent Claim
15 words
A package when formed from a laminate made by a process according to claim 1.
Claim 7
Dependent Claim
38 words
A simultaneous melt-extruded laminate for packaging comprising at least two different thermoplastic polymers, one of which comprises a homogeneous copolymer of acrylonitrile and styrene the molar concentration of units of acrylonitrile being within the range 86% to 93%.
Claim 8
Dependent Claim
38 words
A simultaneous melt-extruded laminate for packaging comprising at least two different thermoplastic polymers, one of which comprises a homogeneous copolymer of acrylonitrile and styrene the molar concentration of units of acrylonitrile being within the range 86% to 93%.
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) | 1980-03-28 | 1980-09-27 | 1981-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-28 | 1984-09-27 | 1985-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-28 | 1988-09-27 | 1989-03-29 | $7700.00 | Window Closed / Lapsed |