US Patent Issued to Covestro Deutschland on May 12 for "Process for preparing a polyisocyanate, polyisocyanate, its use and polyaddition products prepared therefrom" (German Inventors)

ALEXANDRIA, Va., May 12 -- United States Patent no. 12,623,998, issued on May 12, was assigned to Covestro Deutschland AG (Leverkusen, Germany).

"Process for preparing a polyisocyanate, polyisocyanate, its use and polyaddition products prepared therefrom" was invented by Christos Karafilidis (Leverkusen, Germany), Marina Reithmeier (Cologne, Germany), Stefan Wershofen (Monchengladbach, Germany), Michael Schedler (Leverkusen, Germany) and Michael Baecker (Korschenbroich, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a process for preparing a polyisocyanate, namely an isocyanate group-terminated polyol polyanthranilic acid ester. The process comprises the step of react...