Multilayered barrier structures for packaging applications and method for the preparation thereof
CA 2028772 A1 · Owner: Percec, Elena Simona · Inventors: Coffey, Gerald P.; Melamud, Lucy; Percec, Elena Simona
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Multilayered barrier film products providing gas and moisture barrier properties. The film products comprise at least a first polymer film having low permeability to moisture and a heterogeneous polymer blend film containing a gasbarrier polymer and a second polymer distributed in the gas barrier polymer so as, to allow the heterogeneous polymer blend film to adhere to the first polymer film. A method for the preparation of multilayered barrier film products includes the steps of forming a gas barrier polymer film from a heterogeneous polymer blend containing a gas barrier polymer and a second polymer and bonding a moisture, barrier polymer film to at least one side of the gas barrier …
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 October 29, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 29, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 29, 2012.
- 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.