Catalyst composition
CA 2081432 A1 · Owner: De Boer, Eric Johannes Maria · Inventors: De Boer, Eric Johannes Maria; Steernberg, Koen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Catalyst compositions based upon, a. a Group IVA metal compound of the general formula (Cp)MeX4-p wherein Cp represents identical or different cyclopentadienyl groups which may be substituted with one or more hydrocarbyl groups with the understanding that at least one cyclopentadienyl group is substituted with a single optionally substituted aryl group Me, represents a Group IVA metal, X represents one or more substituents attached to the Group IVA metal which substituents are selected from the group consisting of hydrocarbyl groups hydrocarboxy, groups, hydrocarbamide groups hydrogen and halogen, and p is an, integer of from 1 to 4 and, b. an aluminoxane, and a process for the …
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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 26, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 26, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 26, 2014.
- 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.