Improved laminar articles of polyolefin and nylon/polyvinyl alcohol blend and methods related thereto
CA 2321553 A1 · Owner: Plotzker, Irene Greenwald · Inventors: Plotzker, Irene Greenwald
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A laminar shaped article which exhibits substantial improvement in the fluid barrier properties over the laminate of the prior art. The article comprises a heterogeneous blend of: (a) polyolefin with (b) a melt blend of a nylon and a polyvinyl alcohol component, and a compatibilizer (c) which is either: i) a , mixture of two different alkylcarboxyl-substituted polyolefins which serves as a compatibilizer; or ii) a small amount of alkylcarboxyl-substituted polyolefin with a small amount of grafted maleic anhydride moieties; or iii) a high weight percent of alkylcarboxyl-substituted polyolefin with a high graft level of grafted maleic anhydride moieties.
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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 March 23, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 23, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 23, 2021.
- 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.