Process for the preparation of sulphoximines
CA 1201123 A · Owner: Thomae (Karl) Gesellschaft Mit Beschrankter Haftung · Inventors: Weisenberger, Johannes; Muller, Erich; Nickl, Josef
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention describes a process for the preparation of sulphoximines of general formula (I), wherein, A represents a methylene vinylene or ethylene group, (optionally substituted by one or two alyl groups each containing 1 to 3 carbon atoms);, B represents a straight-chain or branched alkylene group containing 2 to 6 carbon atoms and R1 represents an alkyl group containing 1 to 3 carbon atoms (optionally substituted by a phenyl group) or a phenyl group (wherein the aforementioned phenyl nuclei may optionally be substituted by an alkyl group containing 1 to 4 carbon atoms, by a halogen atom by, an alkoxy group containing 1 to 3 carbon atoms or by, a cyclohexyl, phenyl or halophenyl …
Read the whole patent
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
- Granted February 25, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 25, 2003.
- 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.