Catalyst component for olefin polymerization and process for producing polyolefins
CA 2050338 C · Owner: Sugahara, Akinobu · Inventors: Sugahara, Akinobu; Tanaka, Akira; Toda, Masatoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A new carrier of the catalyst for olefin polymerization a solid catalyst composition based on this carrier and a process for producing polyolefins using the solid catalyst composition. The carrier is a solid product obtained by the reaction of metallic magnesium an, alcohol, and a halogen in an amount more than 0.0001 gram-atom for 1 mol of the metallic magnesium. The solid catalyst composition is composed of the solid product a, titanium compound, and an optional electron donor compound.
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 December 26, 1990 and granted May 19, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 26, 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.
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.