ALEXANDRIA, Va., June 12 -- United States Patent no. 12,297,321, issued on May 13, was assigned to SOLVAY SPECIALTY POLYMERS USA LLC (Alpharetta, Ga.) and Cytec Industries Inc. (Princeton, N.J.).

"Poly(ether ketone ketone) (PEKK) composites" was invented by Chantal Louis (Alpharetta, Ga.), James Pratte (Wilmington, Del.) and Craig Swanson (Roswell, Ga.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Poly(ether ketone ketone) (PEKK) composites include reinforcing fibers in a PEKK polymer matrix that includes a PEKK polymer. It was surprisingly discovered that by washing unneutralized PEKK polymer powder with an acid or base, the melt stability of the PEKK polymers can be improved, as compared with PEKK polymer...