Preparation of propene and, if desired, 1-butene
CA 2260304 A1 · Owner: Schulz, Michael · Inventors: Schulz, Ralf; Schwab, Peter; Schulz, Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Propene and, if desired, 1-butene are prepared by a) reacting 1-butene and 2-butene to give propene and 2-pentene in the presence of, a metathesis catalyst comprising at least one compound of a metal of transition, group VIb, VIIb or VIII of the Periodic Table of the Elements b) subsequently separating the propene and 2-pentene formed c) subsequently reacting the 2-pentene with ethene to give propene and 1butene in, the presence of a metathesis catalyst comprising at least one compound of a metal of transition group VIb, VIIb or VIII of the Periodic Table of the Elements, d) subsequently separating the propene and 1-butene formed e) discharging at least some of the 1-butene formed and/or …
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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 9, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 9, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 9, 2021.
- 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.