Catalyst formulation and polymerization processes
CA 2089970 A1 · Owner: Rauscher, David J. · Inventors: Rauscher, David J.; Shamshoum, Edwar S.; Malbari, Shabbir A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Catalyst Formulation and Polymerization Processes Abstract, Methods of polymerization of unsaturated hydrocarbons over Ziegler-type catalysts, and processes for formulating such catalysts consist of sequentially mixing the various components thereof and controlling the order of addition and the durations of mixing such catalyst components. The catalyst components utilized involve a transition metal component, an electron donor component specifically an organosilicon external electron donor, and a co-catalyst component specifically, an organoaluminum co-catalyst which are sequentially mixed together in the course of formulating the Ziegler-type catalyst to be charged to an olefin …
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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 February 19, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 19, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 19, 2015.
- 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.