Paper-like white-opaque heat-sealable polypropylene film
CA 2122284 A1 · Owner: Bohner, Jurgen · Inventors: Bohner, Jurgen; Krallmann, Anton; Albinus, Eberhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A paper-like white-opaque heat-sealable polypropylene film A b s t r a c t, The invention relates to a white-opaque biaxially orientated multilayer film with good heat-sealing properties and with a paper-like appearance on at least one side, comprising an opaque core and at least one outer layer made of:, 10-15% by weight of an isotactic polypropylene having a density of 0.9-0.91 g/cm3 and a melt-flow index of 0.5 g/10 min to 8 g/10 min at 230°C under 21.2 N load (determined to DIN 53735), 5-15% by weight of a low-density linear copolymer of ethylene, modified with rubber and with maleic acid anhydrite, 40-80% by weight of a statistical propylene/ethylene copolymer with 2 to 6% by weight of …
Read the whole patent
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 April 27, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 27, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 27, 2016.
- 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.