Controlled release fertilizer having improved mechanical handling durability and method for production thereof
OwnerNick P. Wynnyk, Eugene G. Stelmack +4inventors
InventorsNick P. Wynnyk, Eugene G. Stelmack, Nicolette M. Babiak, Leslie L. Carstens, J. David Eastham, Baozhong Xing
Life of this patent
Estimating the term…
Abstract
A controlled release fertilizer material comprising a particulate plant nutrient surrounded by a protective coating comprising at least one substantially homogeneous layer of a urethane-containing compound and a filler(s). An organic additive(s) may or may not be present.
Claims61
A controlled release fertilizer material comprising a particulate plant nutrient surrounded by protective coating which comprises a particulate filler.
A process for producing a controlled release fertilizer material comprising the step of contacting a particulate plant nutrient with a protective coating comprising a particulate filler material to surround the particulate plant nutrient.
Dependencies are inferred from the claim text.