Canadian application, no grantCanada
Heterocyclic metal complexes and olefin polymerization process
CA 2247089 A1 · Owner: Al-Ahmad, Saleem A. · Inventors: Timmers, Francis J.; Ashe, Arthur J. Iii; Devore, David D.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Metal complexes, addition polymerisation catalysts containing the same and olefin polymerisation processes using the same comprising a boratabenzene group or divalent derivative thereof are disclosed.
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 March 26, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 26, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 26, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 26, 1997
GrantedNo grant recorded
Term endedMarch 26, 2017
Patent numberCA 2247089 A1
Classification (IPC)C07F7/28 +2 more
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.