Multiply polyolefin sheet, method for making same and related use
CA 2496177 A1 · Owner: Goerlitz, Wolfram · Inventors: Beer, Ekkehard; Goerlitz, Wolfram; Hoecker, Bernd
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a multiply polyolefin sheet consisting of at least three plies, namely a) an intermediate ply A as base layer containing at , least one semicrystalline polyolefin and at least 5,0 wt. % of an amorphous polyolefin, and b) two outer plies B and C on either side of the intermediate , ply which are identical or different and consisting of a polyolefin (polyethylene, polypropylene) and/or of a mixture of polypropylene and an amorphous polyolefin. The inventive sheets combine excellent thermoplasiticity with low shrinking. The chemical composition of the intermediate ply A results in extremely low water absorption and in a very high barrier effect against water …
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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 August 19, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 19, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 19, 2025.
- 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.