Copolymer composed of ethylene oxyde and of at least one substituted oxiranne with a crosslinkable function, process for preparing it, and its use in the making of ionic conductingmaterials
CA 2111047 C · Owner: Avestor Limited Partnership · Inventors: Alloin, Fannie; Harvey, Paul-Etienne; Sanchez, Jean-Yves
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a copolymer composed of ethylene oxide and of at least one substituted oxirane with a crosslinkable function. The copolymer includes ethylene oxide units -O-CH2-CHR- units in which R is a substitute including a crosslinkable reactive function by free radicals and in which R may be different from one unit to another and optionally -O-CH2-CHR' units in which R' is a substitute comprising no crosslinkable reactive function by free radicals in which R' may be different from one unit to another. It is characterised by an excellent polymolecularity index I=Mp/Mn and a statistical distribution of the various monomer units. The copolymer is prepared by an anionic …
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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 December 9, 1993 and granted February 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 9, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 9, 2015.
- 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
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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.