Pyridyl and pyrimidyl derivatives
CA 1321997 C · Owner: Abramo, Aina Lisbeth · Inventors: Christensson, Erik Gunnar; Lundstedt, Torbjorn Erik; Fex, Tomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention concerns novel compounds of the formula: (I), wherein R1 and R2 are the same or different and selected from hydrogen and halogen:, R3 and R4 are the same or different and selected from hydrogen and lower alkyl;, n is 2 or 3;, A is selected from the following pyrimidyl or pyridyl groups , , wherein R5 is selected from hydrogen lower alkyl or halogen; R6 and, R7 are the same or different and selected from hydrogen halogen, lower alkyl, electron donor groups such as lower alkoxy or hydroxy electron acceptor groups such as cyano nitro, trifluoromethyl, COOR8, CONR9 or CO-B; wherein R8 is hydrogen or lower alkyl; R9 and R10 are the same or different and selected from …
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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
- Granted September 7, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 7, 2010.
- 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.