Evergreening of patent

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Evergreening Of Patent

View December 2025 Crrent Affairs

Context: High Court refused to grant interim injunction to Novo Nordisk against Dr. Reddy’s Laboratories (DRL) over alleged infringement of semaglutide-related patents.

About Semaglutide

  • Active Pharmaceutical Ingredient (API) used for Type-2 diabetes and obesity treatment.
  • Marketed by Novo Nordisk as Ozempic (diabetes) and Wegovy (weight loss).
  • API = the component that produces the intended therapeutic effect.

Why the Injunction Was Denied?

  • Court observed that Novo Nordisk’s additional patents involved minor variations of semaglutide.
  • These variations may constitute evergreening, hence not eligible for strong interim protection.

Evergreening of Patents

  • Strategy to extend patent monopoly beyond the 20-year term by:
  • New forms, salts, polymorphs
  • New dosages or delivery systems
  • Minor modifications without improved therapeutic efficacy

Legal Provisions in India

Section 3(d) – Patents Act, 1970

  • Bars patents on new forms/derivatives of known substances unless they show enhanced therapeutic efficacy.
  • Designed to prevent evergreening.

Patentability Requirements

  • Must satisfy:
  • Novelty
  • Inventive step
  • Industrial applicability
  • Minor or obvious changes do not qualify.

TRIPS & Doha Declaration

  • India remains TRIPS-compliant.
  • Uses Doha Declaration flexibilities to safeguard public health and ensure access to affordable generics.
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