MUMBAI, India, June 13 -- Intellectual Property India has published a patent application (202517052025 A) filed by Basf Se, Ludwigshafen am Rhein, Germany, on May 29, for 'value chain return process for the recovery and of polymeric methylene phenylene amine (pmda) as its hci salt from the depolymerization of spend polyurethane and polyisocyanurate rigid foams.'

Inventor(s) include Schaub, Thomas; Schuette, Markus; Mattke, Torsten; Hashmi, A. Stephen K.; and Klein, Philippe.

The application for the patent was published on June 13, under issue no. 24/2025.

According to the abstract released by the Intellectual Property India: "The present invention is directed to a value chain return process comprising the depolymerization of a polyuretha...