Pyrazolopyrimidines
CA 2487544 A1 · Owner: Bayer Cropscience Aktiengesellschaft · Inventors: Gayer, Herbert; Gebauer, Olaf; Loesel, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to novel pyrazolopyrimidines of formula (I) wherein R1 R2, R3, X1 and X2 have the designations cited in the description to a method , for producing said substances and to the use of the same for controlling harmful organisms. The invention also relates to novel intermediates of formulae (II), (V) and (VI), and to methods for producing the same.
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 May 16, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 16, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 16, 2025.
- 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.