(co)polymer crosslinking method, crosslinkable compositions, uses and shaped objects
CA 2048670 C · Owner: Gondard, Christian · Inventors: Gondard, Christian; Michel, Alain
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method for crosslinking (co)polymers comprising chlorine, ester, NH or carbonate groupings according to, which said (co)polymer is reacted at between 100 and 300°C and without the presence of a solvent, with a tinlead-, bismuth- or antimony-based organometallic alcoholate. Mixtures crosslinkable compositions and shaped objects are also described.
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 December 28, 1990 and granted April 28, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 28, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 28, 2012.
- 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.