Process for production of plastic-coated aluminium foil and packaging made from this
CA 2329024 A1 · Owner: Hammon, Werner · Inventors: Hartmann, Werner; Kolb, Franz; Nageli, Hans-Rudolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a process for production of an aluminium foil (10) coated with sealable and sterlisable plastic (14) based on polypropylene (PP) or polyethylene (PE) the plastic (14) is, coextruded with an adhesion-promotion agent (16) and combined with an aluminium foil (24) between two rollers (20, 22). The aluminium foil (10) coextrusion-coated in this way, to increase the adhesion strength between the aluminium foil (24) and the plastic layer (14), then passes continuously through an oven (26) with temperature (TO) set such that the temperature of the plastic layer (14) and the adhesion-promotion agent (16) lies above the crystallite melt point (TK) of the plastic. The coated aluminium foil …
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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 December 18, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 18, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 18, 2022.
- 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.