On 1 April 2013 a two-judge bench of the Supreme Court dismissed Novartis's decade-long campaign for an Indian patent on the beta-crystalline form of Imatinib Mesylate — sold abroad as Glivec (and as Gleevec in the United States). The Court read *Section 3(d)* of the *Patents Act 1970* as a heightened patentability filter for incremental pharmaceutical claims, glossed 'efficacy' as 'therapeutic efficacy', and held that improvements in bioavailability, hygroscopicity and flow are physico-chemical attributes that do not, without more, cross the s.3(d) threshold. The judgment supplied the doctrinal architecture for India's post-TRIPS anti-evergreening regime and remains the anchoring authority on incremental-pharma patentability.
On 27 November 2015 a two-judge Division Bench of the Delhi High Court (Pradeep Nandrajog, J. and Mukta Gupta, J.) delivered the long-awaited decision on Roche's IN 196774 — the Indian patent on Erlotinib Hydrochloride, sold as Tarceva — and Cipla's accused generic Erlocip. The Bench held the suit patent valid, held Cipla's Polymorph B product within the scope of the compound patent (the failure of Roche's downstream Polymorph B claim under *Section 3(d)* did not narrow the parent compound patent), declined a permanent injunction because the patent was within months of expiry, and — most consequentially — held that *Section 3(d)* of the *Patents Act 1970* is a patent-eligibility provision operating at the grant stage and is not available as a defence at the infringement stage. The decision imposed ₹5 lakh in costs on Cipla and remanded for an accounts inquiry. The Special Leave Petition was admitted in 2016 and withdrawn under settlement in June 2017; the Delhi Bench's framework remains good law.