Canadian application, no grantCanada
Process for the preparation of `1,4,5!!-oxadiazepine derivatives
CA 2469044 A1 · Owner: Syngenta Participations Ag · Inventors: Parak, Marian; Jau, Beat
Overview
Drawings and full text
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 1,4,5-oxadiazepine derivatives by reaction of N,N'-diacyl-hydrazines with 2,2'-disubstituted diethyl ethers to form 4,5diacyl-1,4,5-oxadiazepines and reaction of the latter compounds with a hydrohalic acid.
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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 December 17, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 17, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 17, 2024.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 17, 2002
GrantedNo grant recorded
Term endedDecember 17, 2022
Patent numberCA 2469044 A1
Classification (IPC)C07D273/06 +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.