Pyridylalkynyl derivatives as herbicides
CA 2468445 A1 · Owner: Hall, Roger Graham · Inventors: Stoller, Andre; Nebel, Kurt; Schaetzer, Juergen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of formula I wherein the substituents R1 R2, R3, and R4 and the , suffixes n and m are defined in claim 1 and the agrochemically acceptable , salts and all stereoisomers and tautomers of those compounds are suitable for use as herbicides.
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 December 10, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 10, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 10, 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.
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.