Polymerisation catalyst
CA 2446749 A1 · Owner: Innovene Europe Limited · Inventors: Maddox, Peter James; Green, Simon Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A complex of transition metal Ti, Fe, Co Ni, Cr, Mn, Ta, Rh, Y, Sc, Ru, Pd, Zr, Hf V or Nb and a mono-, bi-, tri-, or tetra-dentate ligand wherein at , least one of the donor atoms of the ligand is a nitrogen atom N with a 5membered heterocyclic substituent joined to the N by a carbon atom. The complex is preferably Formula (I) wherein R5-N-G-X1 is a bitri, or tetra-, dentate ligand, N is joined to G by an imine linkage; G is a bridging group which can contain a third or fourth donor atom; X1 is -O or -S if the X1-M bond is covalent, or if the X1 -M bond is dative X1 is =S -PR7R8, -PR8R9, =NR7, =NR8, -NR7R8 or -NR8R9; R5 and R7 are 5-membered heterocyclic substituents joined to the …
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 May 14, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 14, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 14, 2024.
- 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.