Executive Summary
FMC Corporation appealed an order that rejected its application for a permanent injunction against Natco Pharma Limited. FMC alleged that Natco's process for manufacturing Chlorantraniliprole (CTPR) infringed their patented method IN 298645, claiming equivalence between the processes. The Delhi High Court dismissed the appeal, finding no infringement because the use of thionyl chloride by Natco was not equivalent to sulfonyl chloride in the suit patent.
Practitioner Note
This case demonstrates the evidentiary and procedural standards applied in patent matters before Delhi High Court. Understanding the court's reasoning in FMC Corporation & Ors. vs Natco Pharma Limited is valuable context for structuring arguments or assessing risk in similar proceedings.
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