US Patent Issued to SHPP GLOBAL TECHNOLOGIES on June 24 for "Method of making a biphenol dianhydride composition, method for purification of a biphenol dianhydride, and poly(etherimide)s derived from the biphenol dianhydride" (American, Spanish Inventors)

ALEXANDRIA, Va., June 25 -- United States Patent no. 12,338,222, issued on June 24, was assigned to SHPP GLOBAL TECHNOLOGIES B.V. (Bergen op Zoom, Netherlands).

"Method of making a biphenol dianhydride composition, method for purification of a biphenol dianhydride, and poly(etherimide)s derived from the biphenol dianhydride" was invented by James Patrick Schulte II (Mt. Vernon, Ind.), Dadasaheb V. Patil (Mt. Vernon, Ind.) and Juan Justino Rodriguez Ordonez (Cartagena, Spain).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of making a biphenol dianhydride composition includes heating a first solution including a biphenol tetraacid of the formula (I) wherein Ra, Rb, p and q are as defined herein; at lea...