Catalyst for the polymerization of olefins, process for the preparation thereof, and use thereof
CA 2087918 A1 · Owner: Dolle, Volker · Inventors: Dolle, Volker; Herrmann, Hans-Friedrich; Spaleck, Walter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the disclosure Catalyst for the polymerization of olefins process for, the preparation thereof, and the use thereof The present invention relates to a heterogeneous catalyst for the polymerization of olefins, comprising the product of the reaction of an aluminoxane which is insoluble in aliphatic and aromatic hydrocarbons, with at least one metallocene.
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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 January 22, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 22, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 22, 2015.
- 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.