2-phenyl-2h-pyridazine-3-ones
CA 2406227 A1 · Owner: Basf Aktiengesellschaft · Inventors: Westphalen, Karl-Otto; Hamprecht, Gerhard; Witschel, Matthias
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to 2-phenyl-2H-pyridazine-3-ones of general formula (I) wherein the variables R1, R2 and X have the following meanings: X represents halogen; R1 represents hydrogen or C1-C4 alkyl and; R2 represents chlorine, OR3 or NR4R5 wherein R3, R4 and R5 have the meanings as cited in Claim No. 1. The invention also relates to the agriculturally suitable salts of compounds of formula (I). The invention additionally relates to the use of compounds (I) and the salts thereof as herbicides and/or for the desiccation and/or defoliation of plants, to herbicidal agents and to agents for desiccating , and/or defoliating plants which contain, as active substances, compounds (I) …
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 April 12, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 12, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 12, 2023.
- 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.