EPO published patent application EP4184644A1 for LG Energy Solution's solid electrolyte membrane technology for solid-state batteries. The application covers a sulfide-based solid electrolyte with specified compositional ranges and a solid-state battery incorporating the membrane. Designated states include all major EPC contracting states (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LI, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR).

Manufacturers and technology companies developing solid-state battery products should review the patent claims to assess potential licensing requirements or design-around considerations. The patent is now publicly searchable and will enter the national phase examination process in designated states within 30 months of any priority date.