ALEXANDRIA, Va., March 31 -- United States Patent no. 12,589,153, issued on March 31, was assigned to DSM IP ASSETS B.V. (Maastricht, Netherlands).
"Polyurethane excipient" was invented by Jennifer Al-Rashid (Exton, Pa.), Jacob Riffey (Exton, Pa.) and John Andrew Zupancich (Exton, Pa.).
According to the abstract* released by the U.S. Patent & Trademark Office: "In an embodiment, a polyurethane comprises the residues of i. an aliphatic diisocyanate, ii. an aliphatic diol comprising a poly(ethylene oxide) moiety, iii. an aliphatic diol comprising a polycarbonate moiety, and iv. a chain extender, wherein the polyurethane has a melting temperature of 140deg C. or less and has a weight average molecular weight of from 100,000 to 500,000 g/mol....