Controlled release fertilizer and method for production thereof
CA 2436007 A1 · Owner: Agrium Inc. · Inventors: Babiak, Nicolette M.; Geiger, Albert J.; Eastham, J. David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A controlled release fertilizer material comprising a particulate plant nutrient, surrounded by a coating comprising at least one substantially homogeneous layer of a, urethane-containing compound and an organic additive. With appropriate selection of the, additive, the shape and duration of the release profile can be modified to suit a wide, variety of applications.
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 July 25, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 25, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 25, 2025.
- 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.