ALEXANDRIA, Va., July 30 -- United States Patent no. 12,371,423, issued on July 29, was assigned to SpecGX LLC (Webster Groves, Mo.).
"Preparation of sufentanil citrate and sufentanil base" was invented by George Helmut Klemm (Webster Groves, Mo.), Brian Orr (Webster Groves, Mo.) and Joel McClenaghan (Webster Groves, Mo.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided herein are processes for forming sufentanil citrate from sufentanil base. One process comprises forming sufentanil citrate in the presence of a polar non-aqueous solvent. Other processes comprise forming sufentanil citrate in the presence of water."
The patent was filed on Nov. 8, 2022, under Application No. 17/983,051.
*For further i...