Patent 7888531 was granted and assigned to AJINOMOTO CO., INC. on February, 2011 by the United States Patent and Trademark Office.
Nateglinide M-type crystals (main peaks in powder X-ray diffraction: 6.0°, 14.2°, 15.2°, 18.8° (2θ)) can be produced by dissolving nateglinide in a solvent in which nateglinide is highly soluble and then adding a solvent in which nateglinide is difficultly soluble.