Process for producing an olefin polymer article
CA 1197657 A · Owner: Shell Canada Limited · Inventors: Brownscombe, Thomas F.; Willis, Carl L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing an olefin polymer article which comprises charging a fluid olefin monomer and a coordination catalyst to a mould, polymerizing the mixture in the mould in liquid or supercritical phase, continuing the polymerization until a cohesive mass of polymer is formed and accomodating for polymer shrinkage by reducing the volume of the mould during polymerization or by supplying an additional amount of monomer to the mould.
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 10, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 10, 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.