Expired Canadian patentCanada
Catalysts for the polymerization of olefins
CA 2008907 C · Owner: Montedison S.P.A. · Inventors: Resconi, Luigi; Giannini, Umberto; Albizzati, Enrico
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Catalysts for the polymerization of olefins obtained, from special zirconocenic compounds and from alkyl-Al compounds.
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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 30, 1990 and granted August 20, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 30, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 30, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 30, 1990
GrantedAugust 20, 1996
Term endedJanuary 30, 2010
Patent numberCA 2008907 C
Classification (IPC)C08F4/64 +2 more
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.