Process for producing polyolefin
CA 1190536 A · Owner: Sumitomo Chemical Company Limited · Inventors: Hikasa, Tadashi; Baba, Kazuo; Sato, Toshimi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing a polyolefin which, comprises polymerizing an olefin in the presence of a catalyst system comprising, (a) a solid catalyst component obtained by supporting a titanium compound and/or a vanadium compound on a solid product derived from the reaction of a phenol an aromatic carboxylate ester, and a solid reaction product of an organomagnesium compound and an aryloxyaluminum compound represented by the general formula Al(OR1)3, wherein R1 represents an aryl group having 6 to 20 carbon atoms, and, (b) an organoaluminum 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
- Granted July 16, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 16, 2002.
- 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.