Canadian application, no grantCanada
Method for the production of 4,6-dichloropyrimidine with the aid of phosgene
CA 2381608 A1 · Owner: Mais, Franz-Josef · Inventors: Klausener, Alexander; Mais, Franz-Josef; Steffan, Guido
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
4,6-dichloropyrimidine is advantageously produced from 4-chloro-6methoxypyrimidine by using phosgene as chlorinating agent and working in the presence of nitrogen-containing auxiliary agents.
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 17, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 17, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 17, 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 17, 2000
GrantedNo grant recorded
Term endedJuly 17, 2020
Patent numberCA 2381608 A1
Classification (IPC)C07D239/30 +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.