Method for preparing active carrier particles of equal size for a polymerization catalyst
CA 2109834 C · Owner: Borealis Technology Oy · Inventors: Louhelainen, Jarmo; Koskinen, Jukka
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The active carrier particles, of even size of the polymerization catalyst are prepared so that a, melt of a complex composition is provided having the formula (I):, MgCl2 nROH mED in which, ROH depicts an aliphatic alcohol, R is a C1-C6 alkyl, ED de-, picts an electron donor n is 1 to, 6 and m is 0 to I ; the melt provided is fed to a nozzle (4); the, melt is sprayed from the nozzle (4) to the spraying area (5), in, which it is divided into fine mel droplets and possibly partly so-, lidifies; the possibly partly solidified melt particles are trans-, ferred to a cooled crystallization area (6), where they crystallize to, solid carrier particles; and the solid carrier particles are rec-, …
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
- Filed May 29, 1992 and granted March 25, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 29, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 29, 2014.
- 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.