Preparation of multimodal polymer compositions using multinuclear metallocene catalysts
CA 2306987 A1 · Owner: Wilson, Robert B. Jr. · Inventors: Wilson, Robert B. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is provided for preparing polymer compositions which are multimodal in nature. The process involves contacting under polymerization conditions, a , selected addition polymerizable monomer with a metallocene catalyst having two or more distinct and chemically different active sites and a catalyst , activator. The catalyst has structure (Z).
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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 October 16, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 16, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 16, 2020.
- 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
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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.