Pharsight

HOYU CO LTD patents facing oppositions

Top patents of HOYU CO LTD facing oppositions at the European Patent Office (EPO).

Patent Number Grant Date Patent Title Expected Expiration Date Facing Oppositions Activity Alert
EP3272397B1 28 Aug, 2019 Agent for oxidative hair dye and method for stabilizing color tone of oxidative hair dye composition Jul, 2037 2