Process for producing polyolefin having functional group at its terminal
CA 2202483 C · Owner: Kojoh, Shinichi · Inventors: Kojoh, Shinichi; Kioka, Mamoru
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 producing a polyolefin having a functional group at its terminal and the object thereof is to provide a process in which the above polyolefin can be obtained with industrial advantages. This object can be attained by the process comprising step (A) producing a terminal-modified polyolefin of the formula P-AlR1R2, wherein P is a polymer chain and each of R1 and R2 is, for example a hydrocarbon, group having 1 to 10 carbon atoms in the presence of an, olefin polymerization catalyst composed of a solid titanium catalyst component (a) and an organoaluminum compound catalyst component (b) optionally together with an organosilicon compound (c) and …
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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 12, 1995 and granted June 25, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 12, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 12, 2017.
- 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.