EPO published patent application EP4423768A1 titled 'Methods and Apparatus for Determining a Colour Value of Teeth' on March 25, 2026. The patent covers methods and apparatus for measuring tooth colour, with IPC classifications G16H 30/40 and G16H 50/20 related to health informatics. Applicants are Unilever IP Holdings B.V. and Unilever Global IP Limited. The application designates all EU member states plus other EPC contracting states including 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, ME, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR.

This is a patent publication notice with no compliance obligations for external parties. Companies developing competing tooth colour measurement technology should review the patent claims to assess potential infringement risks. Legal and R&D teams monitoring competitors' intellectual property portfolios may wish to file observations during the opposition period if applicable.