Method of producing films by means of coextrusion blow-moulding
CA 2463844 A1 · Owner: Bussi, Philippe · Inventors: Bussi, Philippe; Silagy, David; Reignier, Gerard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method of producing a film comprising at least one layer of a polymer selected from among thermoplastic fluoro-polymers and polymers (A). The inventive method consists in using extrusion blow moulding to coextrude the following: a) at least one layer of a thermoplastic fluoro-polymer and at least one layer of polymer (A); or b) at least one layer of a thermoplastic fluoro-polymer containing charges and optionally at least one other fluoro-polymer layer; or c) at least one layer of polymer (A) the layers extruded in a), b) or c) adhering to one another; d) a layer of another thermoplastic polymer (B) such that it forms a layer which is adjacent to the assembly of …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed October 11, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 11, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 11, 2024.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.