Phoebe Xi
Counsel Patent Attorney

Phoebe Xi is a patent counsel and serves as the leader of Bio-Chemistry Department. With a career spanning back to 2011, she has honed her expertise in patent law and has been an invaluable asset to our firm since 2014.  

Phoebe’s extensive repertoire includes drafting and prosecuting patent applications, skillfully navigating challenges and defenses before the Patent Reexamination and in oral proceedings of Invalidation Board, adeptly overseeing patent portfolios, and strategically shaping patent filing strategies, among other noteworthy accomplishments. 

Her professional acumen extends across a wide spectrum of industries, encompassing bio-chemical, pharmaceutical, and chemical engineering. Phoebe’s distinctive forte lies in areas such as clean energy, small molecule and macromolecular drugs, diagnostics and food, etc., exemplifying her proficiency in these domains.

Before embarking on her journey with ChangTsi, Phoebe enriched her knowledge and experience with a three-year tenure in the R&D department of one of China’s renowned local energy companies.

+86 10 88369999-6027
Patent Prosecution
Beijing

Practice Focus

Practice Areas

Specialized in patent application, patent invalidation, and the patent infringement analysis in the field of biology,
chemistry and mechanics.

Technical Fields

Biology
Chemistry
Mechanics

Years with IP Matters

2015 until now 

Professional Experience

Patent Attorney, Chang Tsi & Partners, Beijing, China, 2014 - Present
Patent Attorney, Jeekai & Partners, 2011 - 2014
R&D engineer, Patent Principal, Xinao Group, 2008 – 2011

Education

Master of Science in Physical Chemistry, Taiyuan University of Technology (2008)
Bachelor of Bioengineering, Inner Mongolia University of Technology (2005)

Representative Clients

  • TAKEDA PHARMACEUTICAL COMPANY LIMITED
  • BOSTIK, INC.
  • TOTAL MARKETING SERVICES
  • RICH PRODUCTS CORPORATION
  • L'OREAL
  • MACROGENICS, INC.
  • CEMPRA PHARMACEUTICALS, INC.

Representative Cases

  • In a case where the examiner intended to reject the application of her client, Xi was able to successfully prove to the examiner the unexpected treatment effect obtained by the compound in the application, and finally obtained the grant of the patent. In light of this excellent work, the client transferred their remaining applications to our law office.
  • In patent reexamination cases for an American chemical company, Xi successfully and repeatedly obtained approval by the Patent Reexamination Board.

Selected Awards

Listed in Premium Intellectual Property Legal Service Brands Guide by Legal Vision

Bar Admission

Chinese Patent Bar(2015)

Languages

Mandarin Chinese
English