Phoenix-based Tessenderlo Kerley Inc. on July 9 was assigned US Patent no. 12,030,827 for “liquid fertilizer comprising thiosulfate,” invented by Michael Massoud Hojjatie, Constance Lynn Frank Lockhart, Thomas Fairweather, and Terry Ludwig. The patent was filed on July 9, 2019, under Application No. 17/266,589.
“The present invention relates to an aqueous liquid fertilizer composition having a 4 wt % to 30 wt % nitrogen content and 8 wt % to 27 wt % sulfur content comprising more than 20 wt % ammonium thiosulfate, calculated as dry matter, and at least 2 wt %, calculated as dry matter, of one other compound selected from the group consisting of a sulfite, bisulfite, urea-triazone compound and zinc sulfate hexahydrate or mixtures thereof, wherein the composition has a salt out temperature of about 0 C or less as measured with the FFF-method,” according to the abstract released by the US Patent and Trademark Office.