Catalyst based on rare earth metal compounds
CA 2324174 A1 · Owner: Braubach, Wilfried · Inventors: Knauf, Thomas; Braubach, Wilfried
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention comprises a catalyst based on rare earth metal compounds which consists of a rare earth metal compound an organic aluminum compound , and, a trihalosilane of a process for the production thereof and of the use of the catalyst, for polymerizing conjugated dimes. Using the catalyst according to the invention it is possible to polymerize , conjugated dimes at high space-time yields to form high molecular weight polybutadienes.
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 October 25, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 25, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 25, 2022.
- 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.