**Source:** MZ Toutiao Brief (美妆头条·快讯) · **Date:** 2026-10-15 · **Category:** Legal / Patents *原文：科丝美诗专利战败诉* A final judgment of the Supreme People's Court — case (2026) 最高法知行终46号, ruled on March 31, 2026 and made public in recent days — has gone against Cosmax (China) Cosmetics Co., Ltd. in an invention-patent dispute. The opposing parties were the China National Intellectual Property Administration, with Shanghai Zhenchun Biotechnology Co., Ltd. as the intervening third party — meaning the matter was a patent-validity challenge that Cosmax ultimately failed to overturn at the highest judicial level, leaving no further avenue of appeal. The report is a wire-style brief and the full reasoning is not yet public, but the signal matters: contract manufacturers are litigating formulation and process patents hard enough to reach the Supreme Court, and this one ended with the Korean ODM's China entity on the losing side. Flash item; summarised from the brief as published. Detail --- Supreme People's Court (2026) 最高法知行终46号 Cosmax (China) vs CNIPA Cosmax unsuccessful [Read the original article](http://www.mztoutiao.com/index/index/kuaixun_list.html)

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