Triazolopyrimidine herbicides
CA 2133209 A1 · Owner: Rempfler, Hermann · Inventors: Rempfler, Hermann
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Trizolopyrimidines of formula (I) wherein R1 is hydrogen C1-C4alkyl or C1-C4haloalkyl; and R2 is C1-C4alkyl C1-C4haloalkyl, C1-C4alkoxy, C1-C4haloalkoxy C1-C4alkylthio, C1-C4haloalkylthio, C1-C4alkoxy-C1-C4aklyl C1-C4alkoxy-C1-C4alkoxy, C1-C4alkoxy-C1-C4alkylthio halogen, amino, C1-C4alkylamino or , C1-C4dialkylamino have pre- and postemergence herbicidal properties. The preparation of these compounds and the use thereof as herbicides are described.
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 March 14, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 14, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 14, 2016.
- 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.