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Sanofi, Regeneron lose U.S. patent challenge to Amgen cholesterol drug


By Jan Wolfe

Feb 25 () - Biotech company Amgen Inc said on Monday a U.S. jury confirmed the validity of patents on its cholesterol drug Repatha, rejecting a challenge by Regeneron Pharmaceuticals Inc and Sanofi SA.

Sanofi and Regeneron had stipulated that if the two Amgen patents were valid, their jointly developed cholesterol drug Praluent infringed them.

Regeneron and Sanofi said in a statement they disagreed with aspects of the ruling and would seek to have it overturned.

"We will continue to vigorously defend our positions against Amgen's overly broad patent claims," Joseph LaRosa, Regeneron's general counsel, said in the statement.

Thousand Oaks, California-based Amgen won a similar verdict in 2016, as well as a court order blocking Praluent sales, but an appeals court set aside the victory and ordered a new trial.

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