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Expired Canadian patentCanada

Polymerisation method by dielectric heating of unsaturated fatty acids, unsaturated fatty acid esters, unsaturated hydrocarbons, or unsaturated derivatives of said products

CA 2348722 C · Owner: Aldivia S.A. · Inventors: Charlier De Chily, Pierre

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Abstract From the Canadian patent

This invention relates to a process of polymerization of unsaturated fatty acids, esters of , unsaturated fatty acids unsaturated hydrocarbons or unsaturated derivatives of these products , by dielectric heating as well as to the polymers obtained and uses of these polymers. It is claimed for the invention that the polymerization process is characterized by the , fact that the reagent or reagent mixture is subjected to dielectric heating that is, heating below , frequencies ranging from around 30 GHz to around 3 MHz (radio or microwave frequencies) to , effect polymerization. The process is conducted with or without catalysts; the reagents are fatty , acids, fatty acid esters plant or …

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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 October 28, 1999 and granted January 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 28, 2019.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 28, 2021.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 28, 1999
GrantedJanuary 10, 2012
Term endedOctober 28, 2019
Patent numberCA 2348722 C
Classification (IPC)C08F20/62 +2 more

Timeline

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2000200220042006200820102012201420162018Application filedOct 28, 1999Patent grantedJan 10, 2012Term endedOct 28, 2019

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.