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Expired Canadian patentCanada

Combination of active substances for inhibiting or regulating nitrification

CA 2182011 C · Owner: Wozniak, Hartmut · Inventors: Michel, Hans-Jurgen; Grabarse, Margrit; Lang, Sieghard

CIPO record

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Abstract From the Canadian patent

This patent describes nitrification inhibitors characterized by the fact that they contain, as their active ingredients 1-hydro-1,2,4-triazole a substituted 1-hydro-, 1,2,4-triazole or their salts or metallic complexes, plus at least one other chemical compound, such, as a substituted pyrazole or its salts or metallic complexes, dicyanodiamide guanyl, thiocarbamide, thiocarbamide, ammonium rhodanide or ammonium thiosulfate, where said combinations exhibit readily recognizable synergetic effects compared to, the case where said chemical compounds are employed alone and thus provide , bene-, fits in terms of better efficacies reduced dosages, and/or cost savings.

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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 February 20, 1995 and granted June 5, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 20, 2015.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 20, 2017.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 20, 1995
GrantedJune 5, 2001
Term endedFebruary 20, 2015
Patent numberCA 2182011 C
Classification (IPC)C05G3/90

Timeline

Timeline From CIPO dates

1996199820002002200420062008201020122014Application filedFeb 20, 1995Patent grantedJune 5, 2001Term endedFeb 20, 2015

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.