Heat sealable films
CA 2279537 A1 · Owner: Exxonmobil Chemical Patents Inc. · Inventors: Donald, Fiona; Espeel, Patrick; Van Loon, Achiel Josephus Maria
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a film comprising: (i) a first surface layer comprising a homopolymer of ethylene having an Mw/Mn of 3 or less or a copolymer of ethylene and up to 50 weight % of a C3 to C20 alphaolefin and CDBI of 50 % or more, and (ii) a second surface layer comprising a homopolymer of propylene or copolymer of propylene and up to 50 % of a comonomer.
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 February 24, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 24, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 24, 2020.
- 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.