A Markush claim is a type of claim commonly used in chemical and pharmaceutical fields. On December 20, 2017, in Beijing Winsunny Harmony Science & Technology Co., Ltd. v. Daiichi Sankyo Co., Ltd, (“Daiichi Sankyo Case”), the Supreme People’s Court (“SPC”) resolved a long standing-split among Chinese courts regarding the interpretation and amendment of Markush…

Pharmaceutical polymorph patents are regarded as effective means and important secondary pharmaceutical patents to extend the life cycle of pharmaceutical patent protection. However, the inventiveness evaluation criteria for pharmaceutical polymorph patents have become much stricter in China while the amount of patent application keeps soaring. The clinical research of pharmaceutical polymorphs commenced in 1950s internationally…