US 12,358,847 B2
Liquid formulations of urease inhibitors for fertilizers
Gary David McKnight, High Point, NC (US); David Bruce Parker, Canyon, TX (US); Yang Zehni, Ningbo City (CN); Ray Perkins, Bakersville, NC (US); and Wei Xu, Sugarland, TX (US)
Assigned to Soilgenic Technologies, LLC, High Point, NC (US)
Filed by Soilgenic Technologies, LLC, High Point, NC (US)
Filed on Aug. 23, 2022, as Appl. No. 17/893,888.
Application 17/893,888 is a continuation of application No. 17/404,932, filed on Aug. 17, 2021.
Application 17/404,932 is a continuation of application No. 16/931,890, filed on Jul. 17, 2020, granted, now 11,365,160, issued on Jun. 21, 2022.
Application 16/931,890 is a continuation of application No. 16/799,772, filed on Feb. 24, 2020, granted, now 11,021,414, issued on Jun. 1, 2021.
Application 16/799,772 is a continuation of application No. 16/294,002, filed on Mar. 6, 2019, granted, now 10,597,338, issued on Mar. 24, 2020.
Application 16/294,002 is a continuation of application No. 15/792,288, filed on Oct. 24, 2017, granted, now 10,329,208, issued on Jun. 25, 2019.
Application 15/792,288 is a continuation of application No. 15/636,211, filed on Jun. 28, 2017, granted, now 10,301,231, issued on May 28, 2019.
Application 15/636,211 is a continuation of application No. 13/890,082, filed on May 8, 2013, granted, now 9,732,008, issued on Aug. 15, 2017.
Claims priority of provisional application 61/708,105, filed on Oct. 1, 2012.
Prior Publication US 2022/0396531 A1, Dec. 15, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C05C 9/00 (2006.01); C05C 9/02 (2006.01); C05G 3/90 (2020.01); C05G 5/23 (2020.01); C05G 5/30 (2020.01); C07F 9/22 (2006.01); C09K 15/28 (2006.01)
CPC C05C 9/005 (2013.01) [C05C 9/00 (2013.01); C05C 9/02 (2013.01); C05G 3/90 (2020.02); C05G 5/23 (2020.02); C05G 5/30 (2020.02); C07F 9/224 (2013.01); C09K 15/28 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method of making an inhibited coated solid fertilizer composition comprising:
applying a non-aqueous liquid coating solution to a solid urea granule thereby forming the inhibited coated solid fertilizer composition,
wherein the non-aqueous liquid coating solution comprises a) DMSO and b) one or more urease inhibitors,
wherein the inhibited coated solid fertilizer composition includes a controlled and homogenous layer surrounding the solid urea granule.
 
13. A method of coating granular urea to generate coated inhibited granular urea comprising:
mixing the granular urea with a dissolved urease inhibitor in a non-aqueous solvent delivery system that comprises DMSO thereby forming the coated granular urea,
wherein the coated granular urea includes a controlled and homogenous layer surrounding the granular urea.