Organic fertilizer having humic properties, its method of production and its use
CA 2354423 A1 · Owner: Katzur, Joachim · Inventors: Fischer, Klaus; Schiene, Rainer; Katzur, Joachim
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for producing an organic fertilizer having humic properties by oxidation and ammonification of lignite. The method is characterized in that the lignite is suspended in an aqueous-ammoniacal medium with a pH of more than 9 to 12, partially dissolved in the process and oxidized at a temperature of between 20 and 100 ~C at normal pressure. The organic fertilizer is obtained as dispersion in the aqueous medium by , thickening or by drying, so that a C/N ratio of between 9 and 15 is achieved. The invention also relates to an organic fertilizer and its use. The above method makes it possible to produce an organic fertilizer having a humus-like structure …
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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 December 17, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 17, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 17, 2021.
- 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.