Catalyst system for high-cis polybutadiene
CA 2425441 A1 · Owner: Potlet, Jean-Marc · Inventors: Van Der Huizen, Adriaan A.; Sabatier, Alain; Potlet, Jean-Marc
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A catalyst system suitable for use in the production of high cis polybutadiene is disclosed. The catalyst system includes a cobalt salt of the formula CoAx where A is a monovalent or divalent anion and x is 1 or 2; an alkyl aluminum chloride compound of the structure R2A1C1 where R is an alkyl group , containing 2-8 carbon atoms; a trialkyl aluminum compound of the formula R3A1 where R is an alkyl group containing 2-8 carbon atoms; and a catalytic amount of water.
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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 2, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 2, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 2, 2023.
- 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.