Process for preparing polyolefins
CA 2099891 A1 · Owner: Nippon Oil Co. Ltd. · Inventors: Matsuura, Kazuo; Shimizu, Hiroyuki; Sano, Akira
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polyolefin is produced by polymerizing at least one olefin in the presence of a catalyst comprising the following I , II , and III :, I a solid catalyst component prepared by reacting the reaction product prepared by reacting the following components (1), (2) and (3) in the presence of a compound represented by the general formula R3OH wherein R3 represents a hydrocarbon group having 6-20 carbon atoms which may contains a hetero atom such as oxygen, nitrogen, sulfur or chlorine with the following component (4):, (1) a silicon oxide and/or an aluminum oxide; (2) a reaction product obtained by the reaction of a magnesium halide and a compound represented by the general formula Me(OR1)n X Z …
Read the whole patent
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 July 6, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 6, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 6, 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.