ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,448,520, issued on Oct. 21, was assigned to Rohm GmbH (Darmstadt, Germany).
"Process for colouring a thermoplastic polymer" was invented by Ursula Golchert (Dieburg, Germany), Ralf Richter (Hanau, Germany), Jorg Kraft (Schoenau, Germany), Gerald Dietrich (Alsbach-Haehnlein, Germany), Ernst Becker (Bensheim, Germany) and Stefan Nau (Buettelborn, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A process can be used for manufacturing a coloured moulding composition with an improved optical appearance and a particularly high thermal stability. The process involves providing a thermoplastic polymer and adding a colouring preparation, or a liquid compo...