Expired Canadian patentCanada
2-amino-4-fluoroalkoxy-1,3,5-triazines and the preparation thereof
CA 2048053 C · Owner: Hamprecht, Gerhard · Inventors: Hamprecht, Gerhard
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
2-Amino-4-fluoroalkoxy-1,3,5triazines of the formula I, where R1 is hydrogen alkyl, alkenyl, alkynyl; R2 is, hydrogen halogen, haloalkyl, trifluoromethoxy or chloro-difluoromethoxy and n is 0 or 1 are prepared as described.
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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 July 29, 1991 and granted December 12, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 29, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 29, 2013.
- 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 29, 1991
GrantedDecember 12, 2000
Term endedJuly 29, 2011
Patent numberCA 2048053 C
Classification (IPC)C07D251/12 +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.