Process for the preparation of a polyolefin
CA 2026237 A1 · Owner: Dolle, Volker · Inventors: Winter, Andreas; Dolle, Volker
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process for the preparation ofdie a polyolefin Olefins of the formula, Ra-CH=CH-Rb, ( Ra Rb = H or C1-C14-alkyl) are polymerized in the presence of a catalyst comprising an aluminoxane of the formula I, (I), for the linear type and/or of the formula (II) (II), for the cyclic type, R1 in the formulae (I) and (II) being a C1-C5-alkyl group or a hydrogen atom and n being an integer from 2 to 50, and 0.01 to 40% of the radicals R1 being hydrogen atoms, and a metallocene. Polymers of high molecular weight are obtained in high yield.
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 September 26, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 26, 2012.
- 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.