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Ai Sun

Beijing Office
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Patent Attorney since 1990
Attorney-at-Law since 1995

Technical Field:

Chemical Engineering, Chemistry, Food Engineering, Material Science and Engineering, and Pharmaceuticals


Chinese, English and Russian

Education and Training:

Bachelor of Science in Chemical Engineering from Tianjin University in 1984

Master of Science in Chemical Engineering from Tianjin University in 1987

Professional Experience:

Joined CCPIT Patent and Trademark Law Office in 1990

Teacher in Beijing Institute of Petrochemical Technology

Practice Area:

Mr. Sun's practice focuses mainly on prosecution and litigation of patent. He has successfully represented some major corporations, especially petroleum companies, in patent prosecution. He has handled more than one thousand patent filing and prosecuting cases covering various technical fields, particularly the fields of chemical engineering, and accumulated rich experience in patent prosecution. Mr. Sun has also handled a lot of patent reexamination and patent invalidation cases before the Patent Reexamination Board, and some patent litigation before the court. He also accumulated rich experience in patent invalidation and patent litigation.

Publication and Presentation:

Co-Author: Study on the Criteria to be met for the contents of all components defined in a composition claim of the open-end form, China Patent News, Mar. 10, 1999;

How to fully understand inventiveness's criteria defined in the patent law of China, Intellectual Property, No 4, 2000.

Professional Affiliation:

All China Patent Agents Association
Member of Chinese Group of AIPPI