Heat-sealable films
CA 2327229 A1 · Owner: Fina Technology, Inc. · Inventors: Hicks, Ben Wayne; Hanyu, Aiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multilayer polyolefin film of the type suitable for packaging application in which heat, seals are formed, and in its preparation the multilayer film comprises a flexible substrate layer, formed of a crystalline thermoplastic polymer having an interface surface. A heat-sealable surface, layer is bonded to the interface surface of the substrate layer and is formed of a syndiotactic, propylene polymer effective to produce a heat seal with itself at a sealing temperature of less than, 110°C. The surface layer has a thickness which is less than the thickness of the substrate layer. The, heat-seal layer can be formed of syndiotactic polypropylene polymerized in the presence of a, …
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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 1, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 1, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 1, 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.