Process for the preparation of 2,3-dichlorosulphonyl- acrylonitriles
CA 1164013 A · Owner: Bayer Aktiengesellschaft · Inventors: Oeckl, Siegfried
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for preparing 2,3-dichlorosulphonyl-acrylonitriles is disclosed by reaction of 3sulphonyl-propionitriles of the formula R1-SO2-CH2-CH2-CN, wherein, R1 denotes optionally substituted aryl aralkyl, alkyl or cycloalkyl, with a chlorination agent in the presence of a basic catalyst at elevated temperature.
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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
- Granted March 20, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 20, 2001.
- 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.