Patent · US Active

Method of preparing a slow release fertilizer

US9446993B2 · kind B2 · utility

16Cited by

1References

13Claims

0Family size

Assignee

UPM-KYMMENE CORPORATION · FI

Inventors

Zhiyong Li · Foster City, US
Yan Zhang · Cincinnati, US

Key dates

Filing date	Sep 26, 2012
Grant date	Sep 20, 2016
Priority date	—
Expiry date	Sep 26, 2032

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09D197/005
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Provided is a method for preparing slow release fertilizer with a coated surface. Furthermore, a formulation of the coating layer 1 comprises lignin, alkenylsuccinic anhydride, stearic acid, polyethylene glycol (PEG)-2000 and kaolin.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.