Eton Pharmaceuticals Confirms First-to-File Patent Challenge on Elcys (Cysteine Hydrochloride Injection)

-Eton confirms first-to-file ANDA referencing Exela Pharma Sciences’ Elcys product -Eton plans to file Post Grant Reviews in the U.S. Patent & Trademark Office challenging the validity of Exela’s listed patents, which, if successful, could allow Eton to launch in 2021 -Eton believes Exela Pharma Sciences is improperly stifling competition on a decades-old drug

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