Patent EP0228041A2 successfully refreshed from Google Patents.
EP0228041A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Filled core materials having unfilled outer layers attached thereto
Assignee: General Electric Co
•
Filing: 1986-12-18
•
Granted: —
•
Expires: 2006-12-18
Abstract
Abstract Improved composite materials are disclosed, in which a thermoplastic core layer has at least one inorganic or organic constituent dispersed therein. A first coextruded thermoplastic outer layer is attached to a first surface of the core layer, and is substantially free of dispersed inorganic and organic constituents, while a second coextruded thermoplastic outer layer is attached to a second surface of the core layer and is also substantially free of dispersed inorganic and organic constituents.
Inventors
- 👤 Ronald Laverne Adams
- 👤 Kirk Lee Kimbel
- 👤 Clayton Byerly Quinn
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 12:46
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/18; B32B27/20; B32B27/06; B32B27/08; B32B27/36; B32B27/365
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
71 words
A coextruded multilayer material comprising a thermoplastic core layer having at least one inorganic or organic constituent dispersed therein, a first coextruded thermoplastic outer layer attached to a first surface of the core layer and substantially free of inorganic and organic constituents; and a second coextruded thermoplastic outer layer attached to a second surface of the core layer opposite the first surface and substantially free of dispersed inorganic and organic constituents.
Claim 2
Dependent Claim
71 words
A coextruded multilayer material comprising a thermoplastic core layer having at least one inorganic or organic constituent dispersed therein, a first coextruded thermoplastic outer layer attached to a first surface of the core layer and substantially free of inorganic and organic constituents; and a second coextruded thermoplastic outer layer attached to a second surface of the core layer opposite the first surface and substantially free of dispersed inorganic and organic constituents.
Claim 3
Dependent Claim
14 words
The multilayer material of claim 1 wherein the thermoplastic core layer is a polycarbonate.
Claim 4
Dependent Claim
14 words
The multilayer material of claim 1 wherein the thermoplastic core layer is a polyester.
Claim 5
Dependent Claim
15 words
The multilayer material of claim 1 wherein the first coextruded outer layer is a polycarbonate.
Claim 6
Dependent Claim
15 words
The multilayer material of claim 4 wherein the second coextruded outer layer is a polycarbonate.
Claim 7
Independent Claim
77 words
A method of preventing the migration of inorganic and organic constituents or mixtures thereof dispersed in an extruded thermoplastic material to surfaces adjacent the surfaces of the extruded thermoplastic material comprising coextruding the thermoplastic material having inorganic constituents, organic constituents or mixtures thereof with a first outer layer of a thermoplastic material substantially free of dispersed inorganic and organic constituents, said outer layer attached to a first surface and acting as a barrier to the migrating constituents.
Claim 8
Independent Claim
77 words
A method of preventing the migration of inorganic and organic constituents or mixtures thereof dispersed in an extruded thermoplastic material to surfaces adjacent the surfaces of the extruded thermoplastic material comprising coextruding the thermoplastic material having inorganic constituents, organic constituents or mixtures thereof with a first outer layer of a thermoplastic material substantially free of dispersed inorganic and organic constituents, said outer layer attached to a first surface and acting as a barrier to the migrating constituents.
Claim 9
Dependent Claim
55 words
The method of claim 6 further comprising coextruding on a second surface of the thermoplastic material having the constituents dispersed therein and being opposite the first surface of the material, a second outer layer of a thermoplastic material substantially free of dispersed inorganic and organic constituents and acting as a barrier to the migrating constituents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.