US PTO backs IPR for Argentum on Gilenya patents

11 August 2017

The US Patent & Trademark Office (PTO) on August 9 granted Argentum Pharmaceuticals' petition for inter partes review (IPR) against all claims of the last-expiring patent listed in the Food and Drug Administration's Orange Book covering Novartis’ multiple sclerosis Gilenya (fingolimod) drug, the company announced today.

US privately owned generic drugmaker Argentum challenges claims 1−6 of Novartis' US Patent No 9,187,405, which the Orange Book states will expire in 2027.

In instituting Argentum's IPR, the PTO concluded that Argentum established a reasonable likelihood that it would prevail in showing the unpatentability of claims 1–6 of the '405 patent.

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