Method for making a nitrogenous fertilizer having a stabilized liquid form for releasing nitrogen for a long time
CA 2337831 A1 · Owner: Costa, Gianluca · Inventors: Rizzi, Giuseppe; Costa, Gianluca; Miele, Sergio
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 a method for making a liquid nitrogenous fertilizer, designed for continuously releasing for a long time, nitrogen , having an optimum agrochemic efficiency index which is not phytotoxic at the , leave and root level with very low negative environmental impacts.
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 June 28, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 28, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 28, 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.