4-hetaroylpyrazol derivatives and the use thereof as herbicides
CA 2266450 A1 · Owner: Rack, Michael · Inventors: Kardorff, Uwe; Rack, Michael; Engel, Stefan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Hetaroyl derivatives having the formula (I) are disclosed as well as their , salts useful in agriculture. In the formula the variables have the following , meanings: R1 R2 are hydrogen, nitro, halogen, cyano rhodano, hydroxy, mercapto, optionally substituted and/or functionalised C1-C6 alkyl C1-C6 , alkoxy, C1-C6 alkylthio, C1-C6 alkylsulfinyl C1-C6 alkylsulfonyl, C1-C6 , alkoxysulfonyl or optionally substituted phenyl, phenoxy phenylthio, phenylsulfinyl or phenylsulfonyl; Z is an optionally substituted 4-membered, unsaturated, partially or completely saturated chain with three carbon atoms and one nitrogen atom; and Q is optionally substituted hydroxypyrazol of Formula (II) linked at …
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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 September 9, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 9, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 9, 2019.
- 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.