Preparation of polychlorinated pyridines from 2,4- dichloro-6-(trichloromethyl) pyridines
CA 1084936 A · Owner: Dow Chemical Company · Inventors: Love, Jim; Dietsche, Thomas J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Pentachloropyridine and polychloro derivatives of 2-(trichloromethyl)pyridine are prepared by reacting 2,4-dichloro-6-(trichloromethyl)pyridine in the liquid state with chlorine at temperatures of from about 160°C in the presence of a Lewis acid type catalyst. The products are useful as herbicides pesti-, cides, or as chemical intermediates for the preparation of other products useful, for example as herbi-, cides or pesticides.
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 September 2, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 2, 1997.
- 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.