Two-layer polyolefin thermoshrinkable film
CA 2242884 A1 · Owner: Perdomi, Gianni · Inventors: Cometto, Claudio; Perdomi, Gianni
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a thermoshrinking film consisting essentially of: a) a layer A of low density polyethylene; b) a layer B made from a composition comprising: 73 to 95 % by weight of a copolymer (i) of ethylene with at least one .alpha.-olefin CH2=CHR where R is an alkyl radical having 1 to 10 carbon atoms, said copolymer having density between 0.920 and 0.960 g/cm3 and a content of .alpha.-olefin CH2=CHR derived units up to 10 % by mole; 5 to 27 % by weight of a copolymer (ii) of propylene with ethylene and/or at least one .alpha.-olefin CH2=CHRI, where RI is an alkyl radical having 2 to 10 carbon atoms; said copolymer containing 60 to 98 % by weight of propylene said , …
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 December 8, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 8, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 8, 2019.
- 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.