Process for the preparation of a polyolefin wax
CA 2024718 A1 · Owner: Antberg, Martin · Inventors: Winter, Andreas; Spaleck, Walter; Antberg, Martin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the disclosure: A process for the preparation of a polyolefin wax If a catalyst consisting of an aluminoxane and a metallocene of the formula I, (I), in particular R5R6C (Ind)2 or R5R6C (Ind)2 Zr(CH3)2 is, employed for the polymerization of olefins of the formula R9CH = CHR10, (R9, R10 = H or C1-C28 alkyl) the isotacticity of the, polymer wax and hence the hardness and melting point can be varied simply by changing the polymerization temperature, without the molecular weight of the polymer being noticeably changed at the same time.
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 6, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 6, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 6, 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.