Method for producing 4-vinylcyclohexene, ethyl benzole and styrene
CA 2474762 A1 · Owner: Schindler, Goetz-Peter · Inventors: Walsdorff, Christian; Hibst, Hartmut; Harth, Klaus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for producing 4-vinylcyclohexene comprising the following steps: (A) a feed gas stream containing n-butane is prepared; (B) said feed gas stream containing n-butane is fed to at least one dehydrogenation zone, where it is dehydrogenated from n-butane to butadiene whereby a butadiene, n-butane, optionally 1-butene and 2-butene and optionally water vapour and a product stream containing additional minor constituents are obtained; (C) the product stream from the dehydrogenation optionally after , separation of the water vapour and minor constituents is fed to a , dimerization zone, where the butadiene is catalytically dimerized to obtain …
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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 17, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 17, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 17, 2025.
- 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.