Catalyst and process for (co) polymerizing alpha-olefins
CA 2109156 A1 · Owner: Luciani, Luciano · Inventors: Ballato, Evelina; Gila, Liliana; Milani, Federico
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
CATALYST AND PROCESS FOR (CO)POLYMERIZING ALPHA- OLEFINS", Abstract, A catalyst active in the polymerization of alphaolefins is formed by:, (a) a bis(cyclopentadienyl) bis(amide) derivative of an element of Group IVB of the Periodic Table of the Elements, to be defined by means of the formula :, (I), wherein M represents a metal of Group IVB each of, R1, R2, R3 and R4, and Cp have the same meaning as reported in the disclosure, and, (b) an aluminoxane co-catalyst. This catalyst finds use in the processes of ethylene and other alpha-olefins polymerization and copolymerization.
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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 October 25, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 25, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 25, 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.