Blends of and methods of blending olefin/ester copolymers having improved environmental stress cracking or environmental fatigue resistance, products made therefrom, methods of molding said products
CA 2250910 A1 · Owner: O'Donnell, Hugh Joseph · Inventors: O'Donnell, Hugh Joseph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A blend and flexible product made of two copolymers of an olefin and an ethylenically unsaturated carboxylic ester monomer. The copolymers are selected such that each copolymer includes greater than 6 weight percent ethylenically unsaturated carboxylic ester monomer or selected to be more , than 10 weight percent of the blend. If the copolymers have similar ester contents, that is differing by less than 6 weight percent the copolymers are , selected such that their difference in their melt flows is greater than about 8. If the copolymers have dissimilar ester contents that is differing by more , than 6 weight percent the copolymers are selected such that the ratio of their melt flows …
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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 April 3, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 3, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 3, 2019.
- 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.