Isoxazolecarboxamides, their preparation and their use
CA 2117499 A1 · Owner: Kardorff, Uwe · Inventors: Walter, Helmut; Maywald, Volker; Westphalen, Karl-Otto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Isoxazole carboxylic acid amides of formula (I) in which the substituents have the following meaning: R1 = alkyl cycloalkyl, alkoxyalkyl, alkenyl, alkinyl phenyl or possibly substituted benzyl, R2 = hydrogen or alkyl; R3 = alkyl cycloalkyl, alkenyl, alkinyl, phenyl or possibly substituted benzyl and the plant-tolerated salts of those compounds in which R2 is hydrogen their production and use.
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 16, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 16, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 16, 2015.
- 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.