Thermoplastic, coupled barrier composites
CA 2051797 A1 · Owner: Kline, Sally A. · Inventors: Kline, Sally A.; Perry, Scott; Eckstein, Yona
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multi-phase polymer composite having reduced oxygen permeability comprising the reaction product of a vinyl thermoplastic polymer having a major portion comprising an interpolymerized non-carbonyl containing vinyl monomer or mixture of polymerizable monomers, a polyhydric polymer derived from a saponified vinyl ester polymer having greater than about 40 mole percent vinyl alcohol content and a reactive coupling agent. The composites exhibit improved impact and delamination resistance and exhibit a wide processing window for melt processing such as injection blow molding of containers and the like. 1900021
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 September 18, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 18, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 18, 2013.
- 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.