Lakshmikumaran & Sridharan AttorneysAn ISO 9001 / 27001 certified law firm

Prosenjit Chattopadhyay

Joint Partner, New Delhi Dr.-Prosenjit-Chattopadhyay

Dr. Prosenjit Chattopadhyay is a registered Indian patent agent with strong expertise and knowledge in Life Sciences domain. He is actively involved in drafting and prosecution of pharmaceutical, chemical, and biotechnological patent applications. He is as well instrumental in providing litigation support in patent opposition, revocation, infringement and invalidity, and handling IP searches for patentability, FTO, invalidation, and patent landscapes. Dr. Chattopadhyay has successfully handled patent portfolios in a wide variety of technologies, including pharmaceuticals, prodrugs and metabolites of pharmaceuticals, formulations, protein conjugates, polymers, petrochemicals, nanomaterials, process technology.

Before joining L&S, Dr. Chattopadhyay worked with premier manufacturer of oncology drugs, in their anti-cancer research division. Dr. Chattopadhyay was a post-doctoral scholar at Osaka University, Japan, where he worked in the area of metalloporphyrinoids and hemeproteins. He was also awarded with G-COE fellowship for post-doctoral research.


  • Ph.D. (Organic Chemistry), IIT Delhi
  • M.Sc. (Chemistry), IIT Delhi
  • B.Sc. (Chemistry), University of Delhi
  • Post Graduate Diploma in IPR, Indian Law Institute, New Delhi

Practice Areas:

  • Pharmaceuticals
  • Chemicals
  • Material chemistry including nano-materials
  • Biotechnology
  • Petrochemicals
  • Polymers
Tel: +91 (11) 46063344
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