EPO published patent application EP4186867A1 for a method of producing nickel-containing hydroxide suitable for lithium ion secondary battery positive electrode active materials. The patent was filed by Sumitomo Metal Mining Co., Ltd. (inventor: OZAWA, Shuuzou) and covers the hydroxide compound, the production method, the positive electrode active material produced from it, and lithium ion secondary batteries incorporating the material. The application is classified under C01G 53/00 and H01M 4/505/525.

Patent publications do not create compliance obligations for third parties. Companies manufacturing lithium ion battery materials may review this patent to understand potential intellectual property considerations in their R&D and production processes. No action is required for regulatory compliance purposes.