ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,785,139, issued on Nov. 3, was assigned to SYENSQO SA (Brussels).

"Sulfide-based solid composite electrolyte film" was invented by Vincent Finsy (Halle, Belgium), Fernand Gauthy (Wemmel, Belgium), Luca Merlo (Ixelles, Belgium) and Marc-David Braida (Bry-sur-Marne, France).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a process for manufacturing a free-standing solid composite electrolyte film, comprising the steps of a) mixing (i) at least one sulfide-based solid ionic conducting inorganic particle and (ii) at least one tetrafluoroethylene (TFE) (co)polymer to form a paste and b) calendaring or extruding the paste to prod...