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Expired Canadian patentCanada

Multiple catalyst system for olefin polymerization and polymers produced therefrom

CA 2499951 C · Owner: Johnsrud, David R. · Inventors: Abhari, Ramin; Dekmezian, Armenag; Johnsrud, David R.

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Abstract From the Canadian patent

This invention relates to a polymer comprising one or more C3 to C40 olefins optionally one or more diolefins, and less than 15 mole % of ehtylene where , the polymer has: a) a Dot T-Peel of 1 Newton or more; and b) a branching index (g') of 0.95 or less measured at the Mz of the polymer; c) an Mw of 100,000 or less and to a continuous process to produce a branched olefin polymer comprising 1) selecting a first catalyst component capable of producing a polymer having an Mw of 100,000 or less and a crystallinity of 5% or less under selected polymerization conditions; 2) selecting a second catalyst component capable of producing polymer having an Mw of 100,000 or less and a …

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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 15, 2003 and granted May 28, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 15, 2023.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 15, 2025.
  • 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 15, 2003
GrantedMay 28, 2013
Term endedOctober 15, 2023
Patent numberCA 2499951 C
Classification (IPC)C09J123/02 +1 more

Timeline

Timeline From CIPO dates

2004200620082010201220142016201820202022Application filedOct 15, 2003Patent grantedMay 28, 2013Term endedOct 15, 2023

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