Mr. Zhan joined Liu, Shen & Associates in 2011. He specializes in patent prosecution, re-examination, patent invalidation, IP litigation, and client counseling with a focus on Petrochemical Engineering, Material Science, Polymer Chemistry and Chemical Engineering. Before joining Liu, Shen & Associates, he worded as a patent examiner of SIPO for more than four years and examined more than 500 patents. He also was a teacher of the new examiner and a quality inspector in his department when working in SIPO.

Mr. Zhan got his qualification as a patent attorney in 2010. He has participated in several patent lawsuits including patent infringement and patent invalidation. He has been leading patent licensing counseling, patent invalidation and pre-litigation analysis in the firm.

Mr. Zhan studied in Tsinghua university and majored in Marterial Science and Engineering. He got his Bachelor degree in Tsinghua university on July, 2005 and his Master degree on July, 2007. 

Representative cases that Mr. Zhan has participated include

Arkema (France) V. Mexichem Amanco (Mexico), in the patent invalidation case of Arkema (France) V. Mexichem Amanco (Mexico), Mr. Zhan and his colleagues represented Arkema and finally invalidated the patent right of Mexichem Amanco and won the case in the first instance at Beijing No.1 Intermediate Court.