Tetrazolinone derivatives
CA 2374018 A1 · Owner: Watanabe, Yukiyoshi · Inventors: Ito, Seishi; Watanabe, Yukiyoshi; Goto, Toshio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
According to the instant invention there have been found novel tetrazolinone derivatives represented by formula (I) wherein R1 represents methyl or ethyl R2 represents halogen, alkyl, haloalkyl alkoxy, haloalkoxy, alkylthio, haloalkylthio alkylsulfinyl, alkylsulfonyl, phenyl, phenoxy alkoxycarbonyl, nitro or cyano, and n represents 0 1, 2, 3, 4 or 5, processes and , intermediates for their preparation and their 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 May 8, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 8, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 8, 2022.
- 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.