Composite film structure for manufacturing pouches using rotary thermic sealing
CA 2463958 A1 · Owner: Dupont Canada Inc. · Inventors: Climenhage, David C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sealant layer for use in a composite film structure which includes at least , one non-melting layer the structure being for manufacturing pouches for containing flowable material utilizing high speed vertical form fill and seal , processes with rotary thermic sealing the sealant layer comprising from about 70 to about 90% by weight of a single-site catalyst C4-C10 ethylene alphaolefin polymer having a density in the range of from .890 to about .912 gm/cc and a melt index in the range of from about .2 to about 2.0 dg/cc and from , about 10 to about 30% by weight of one or more of the following: a linear low density polyethylene selected from single-site catalyst and multi-site …
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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 October 21, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 21, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 21, 2024.
- 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.