Canadian application, no grantCanada
Method for making methyl ethyl ketone cyanohydrin
CA 2383134 A1 · Owner: Esch, Marc · Inventors: Croizy, Jean-Francois; Esquirol, Gilbert; Esch, Marc
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a method for making ketone methyl ethyl cyanohydrin of formula (I) characterised in that it consists in reacting hydrocyanic acid and ketone methyl ethyl in the presence of diethylamine as catalyst.
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
- Filed July 25, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 25, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 25, 2022.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 25, 2000
GrantedNo grant recorded
Term endedJuly 25, 2020
Patent numberCA 2383134 A1
Classification (IPC)C07C253/00 +1 more
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.