Chlorination of meta-phenoxytoluene
CA 1104159 A · Owner: Shell Canada Limited · Inventors: Van Helden, Robert; Sheldon, Roger A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the preparation of a mixture of a meta-phenoxybenzyl chloride and a meta-phenoxybenzal chloride which comprises chlorinating a meta-phenoxytoluene with sulphuryl chloride in the presence of a free-radical initiator under conditions such that the formation of ring-chlorinated derivatives is minimized.
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 June 30, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 30, 1998.
- 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.