The EPO published patent EP3929159A1 granted to Sumitomo Metal Mining Co., Ltd. for a positive electrode active material used in lithium ion secondary batteries. The patent covers both the composition/material itself and the method for manufacturing the electrode material. The application was published March 25, 2026, and is designated for all EU member states plus several additional European countries including Switzerland, Norway, and Turkey.

Patent publications are informational notices that establish intellectual property rights for the applicant. Companies developing or manufacturing lithium ion battery components should review this patent to assess potential freedom-to-operate implications and avoid potential infringement claims. This publication does not impose compliance obligations but may affect competitive landscape in the battery materials sector.