Process for the preparation of 3-bromobenzaldehyde
CA 1069135 A · Owner: Shell Canada Limited · Inventors: Sheldon, Roger A.; Ginsberg, Eduard A.; Verbrugge, Pieter 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 3-bromobenzaldehyde which comprises brominating benzaldehyde at a temperature below 100°C in the presence of a chlorinated hydrocarbon solvent and a bromination catalyst, the molar ratio of bromination catalyst to benzaldehyde being at least 1:1, wherein the bromination is carried out using a mixture of chlorine and bromine.
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 January 1, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 1, 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.