STAT Plus: Ruling threatens to upend patents on Moderna’s Covid-19 vaccine

Moderna, racing to develop a vaccine for Covid-19, lost a key patent decision Thursday, one that could delay the company’s progress or force it to hand over a cut of profits.

The U.S. Patent and Trademark Office denied Moderna’s claim that a patent held by a rival company was invalid. The patent, which covers technology used to deliver messenger RNA treatments, is held by the Canadian firm Arbutus.

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