Polymerization catalyst
CA 1187862 A · Owner: Exxon Research And Engineering Company · Inventors: Johnson, Burnett H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An organometallic-transition metal compound complex either without support or supported on a support material such as silica, alumina or silica-alumina is treated with a halogen or interhalogen compound to produce a polymerization catalyst component which when employed in combination with an aluminum alkyl co-catalyst obtains high activity and excellent molecular weight control.
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 28, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 28, 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.