Process for the preparation of (co)polymers of ethylene having a broad molecular weight distribution
CA 2111312 A1 · Owner: Spherilene S.P.A. · Inventors: Sacchetti, Mario; Pennini, Gianni; Cuffiani, Illaro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a process for the preparation of homopolymers and copolymers of ethylene having a broad molecular weight distribution. The polymerisation is carried out in the presence of catalysts comprising the product of reaction between an alkyl-A1 compound and a solid catalytic component comprising a titanium compound supported on a magnesium halide in an active form, having a spherical morphology and particular surface and porosity characte-ristics.
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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 December 13, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 13, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 13, 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
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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.