Process for producing olefin polymers
CA 1338331 C · Owner: Saito, Noriaki · Inventors: Kumahara, Katsumi; Saito, Noriaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In the process for producing olefin polymers by the use of a homogeneous catalyst composed essentially of (A) a liquid transition metal compound the metal of which belongs to group IVB of the Periodic Table and (B) an aluminoxane, a process capable of producing olefin polymers efficiently in a small quantity of the catalyst used and particularly capable of reducing the quantity of aluminoxane used is provided, which process comprises separating the catalyst from the resulting polymer and polymerizing the olefin repeatedly using the thus separated catalyst.
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
- Granted May 14, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 14, 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.
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.