Catalyst and process for the preparation of high-molecular-weight polyolefins
CA 2072490 A1 · Owner: Kaminsky, Walter · Inventors: Kaminsky, Walter; Renner, Florian
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 and process for the preparation of highmolecular-weight polyolefins, High-molecular-weight polyolefins in particular those of, propylene, which have high tacticity are obtained by polymerization of copolymerization of .alpha.-olefins using a catalyst system comprising an aluminoxane and a supported catalyst component, the latter being prepared from an inorganic support material, preferably SiO2 and a, metallocene.
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 June 26, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 26, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 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.