Multilayered barrier structures
CA 2123809 A1 · Owner: Rolando, Richard J. · Inventors: Rolando, Richard J.; Wilfong, Debra L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Multilayered barrier structures (10) comprising a gas barrier layer (12) of a non-chlorine containing organic polymer which is substantially impermeable to oxygen gas and a moisture barrier layer (14) of a mesophase propylene-based material are provided. These structures are environmentally compatible and radiation resistant, and exhibit one or more additional properties including gas, barrier properties, moisture barrier properties toughness, heat, sealability, softness and quietness during wrinkling. Also, provided are methods of preparing and using such multilayered barrier structures, and articles, such as films pouches, and tubings, formed from these structures as well as multilayer …
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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 November 18, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 18, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 18, 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.