Process for preparing olefin polymers or copolymers
CA 1115447 A · Owner: Mitsui Petrochemical Industries, Ltd. · Inventors: Minami, Syuji; Toyota, Akinori; Kashiwa, Norio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is a process for obtaining highly stereoregular poly or or copolymers. The process comprises polymerizing or copolymerizing olefins in the presence of a catalyst comprising: a solid complex titanium component at least containing magnesium titanium and halogon, an organometal-, lic compound of a metal of Groups I to III of the periodic table and an, organic acid anhydride.
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 December 29, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 29, 1998.
- 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.