Halonitriles and their preparation
CA 1207793 A · Owner: The Dow Chemical Company · Inventors: Pews, R. Garth; Lysenko, Zenon
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel halonitriles having the formula wherein R1 is H, alkyl or aryl; R2 is alkyl cyclo-, alkyl or aryl; X1 is Cl, Br or I; X2 is X1 H, alkyl, aryl or cycloalkyl, and X3 is F Cl or Br, e.g. 2,4-dichloro-2-fluoro-5,5-dimethoxy-4-methylpentannenitrile, method of preparation and use to make halopyridines. These compounds are intermediates in the preparation of agricultural products.
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 July 15, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 15, 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.