Expired Canadian patentCanada
Supported monocyclopentadienyl transition metal olefin polymerization catalysts
CA 2090972 C · Owner: Licciardi, Gary Frederick · Inventors: Canich, Jo Ann Marie; Licciardi, Gary Frederick
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A supported catalyst system comprises in inert support material a Group IV B , transition metal component and an alumoxane component; it may be employed to polymerize olefins to produce a high molecular weight polymer.
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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 September 13, 1991 and granted April 24, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 13, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 13, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 13, 1991
GrantedApril 24, 2001
Term endedSeptember 13, 2011
Patent numberCA 2090972 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.