Components and catalysts for the polymerization of ethylene
CA 2073785 C · Owner: Montell North America Inc. · Inventors: Zucchini, Umberto; Cuffiani, Illaro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Solid catalyst components for the preparation of catalysts capable of producing (co)polymers of ethylene with ultra high molecular weight are obtained in the form of particles having an average diameter of less than 10 micrometers by way of, reaction, in the presence of H2O between:, 1) a liquid obtained by reacting: A) a titanium compound containing at least one Ti-OR bond, where R is a C1-C20 alkyl C3-C20 cycloalkyl, or, C6-C20 aryl radical; with B) a magnesium compound selected from: halides; compounds comprising at least one -OR or -OCOR group bonded to the magnesium, where R is a C1-C20 alkyl C3-C20 cycloalkyl, or C6-C20 aryl radical; organometallic compounds; products of the reaction …
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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 July 14, 1992 and granted August 31, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 14, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 14, 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
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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.