Activating composition of metallocene complexes in the catalysis of (co) polymerization processes of olefins
CA 2292243 C · Owner: Sommazzi, Anna · Inventors: Proto, Antonio; Sommazzi, Anna; Masi, Francesco
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Organo-metallic composition without boron comprising an extensively fluorinated organic compound stable to the air, having a di-unsaturated cycle with five or six carbon atoms and an alkyl derivative of magnesium or preferably, of aluminum. Said composition can be used as activator of a metallocene complex of group 4 of the periodic table of elements to form a catalyst with a high activity and low metal content for the polymerization of .alpha.-olefins.
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 10, 1999 and granted January 31, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 10, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 10, 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.
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.