ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,509,581, issued on Dec. 30, was assigned to ARKEMA FRANCE (Puteaux, France).

"Particles of polyamide powders and use thereof in powder agglomeration processes" was invented by Geoffroy Cammage (Serquigny, France), Arnaud Lemaitre (Serquigny, France) and Emilie-Marie Soares Latour (Serquigny, France).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a seeded particle of polyamide (PA) powder consisting of: a polyamide core with a D50 within the range from 15 to 60 micro metre, and a polyamide shell,characterized in that the shell has an inherent viscosity in solution and a melting temperature which are respectively higher than those ...