US Patent Issued to Covestro Deutschland on July 22 for "Process for partial colouring of plastic parts using solid colourants in colour- carrier layers" (German Inventors)

ALEXANDRIA, Va., July 23 -- United States Patent no. 12,365,775, issued on July 22, was assigned to Covestro Deutschland AG (Leverkusen, Germany).

"Process for partial colouring of plastic parts using solid colourants in colour- carrier layers" was invented by Georgios Tziovaras (Neuss, Germany), Heinz Pudleiner (Krefeld, Germany), Roland Kuenzel (Leverkusen, Germany) and Florian Stempfle (Cologne, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a process for partial colouring, in particular colour laser engraving, of plastic parts, preferably of thermoplastic parts, very particularly preferably of thermoplastic parts comprising a layer construction, comprising the steps of: i...