Multilayer laminated film having an improved gas barrier action
CA 2073653 A1 · Owner: Kuechler, Manfred · Inventors: Kuechler, Manfred; Reinhard, Guenter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Hoe 91/F 221, Abstract of the disclosure: Production of multilayer laminated films which can be subjected to thermoplastic shaping and have an improved gas barrier action, consisting of at least one gas barrier film based on highly hydrolyzed plasticizer-, containing polyvinyl alcohol with on one side or both, sides, covering films of plastic which are insoluble in water, impermeable to water and water vapor and if appropriate insoluble in organic solvents and which are laminated to the gas barrier film over the entire surface by means of special adhesive layers which have pressuresensitive adhesive properties. The adhesive layers consist of copolymers having a glass transition temperature …
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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 July 10, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 10, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 10, 2014.
- 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.