Diene production
CA 1072126 A · Owner: Imperial Chemical Industries Limited · Inventors: Milner, David J.; Hewertson, Warren; Holland, David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
MD/Q/PP.28025/28647, ABSTRACT OF THE DISCLOSURE Improved process for making 1, 1-dihalo-4-,methyl pentadienes (especially 1, 1-dichloro-4-methyl-1,3-pentadiene) by reaction between isobutene and a trihaloethylene in the vapour phase at temperatures up to about 600°C. The 1:4pentadiene isomer formed can be isomerised to the 1:3-pentadiene isomer. The process is simpler and more efficient than known processes, and the products are intermediates for making insecticides.
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 19, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 19, 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.