Diureides and their use
CA 2299871 A1 · Owner: Basf Aktiengesellschaft · Inventors: Wissemeier, Alexander; Horchler Von Locquenghien, Klaus; Erhardt, Klaus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to the use of diureides of dicarboxylic acids of the formula I, in which R is hydrogen or SO2O~M~, M~ is lithium sodium, potassium, cesium, ammonium, copper silver, 0.5 iron, 0.5 calcium, 0.5 magnesium 0.5 manganese, 0.5 zinc or 0.5 cobalt and x is a saturated or monounsaturated, straight-chain or branched C1- to C8-alkyl which may be interrupted by oxygen or NH and which may have attached to it C1- to C4-alkoxy hydroxyl, and/or amino groups, as slow-release fertilizers and to novel diureides of the formula Ia in which, R is SO2O~M~, is lithium, sodium potassium, cesium, ammonium, copper, silver 0.5 iron, 0.5 calcium, 0.5 magnesium, 0.5 manganese 0.5 zinc or …
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 1, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 1, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 1, 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.