Propafenone - Patent Issues

Patent Issues

The patents for the Rythmol family of products are owned by Reliant Pharmaceuticals, Inc., in Liberty Corner, N.J. Reliant acquired the patents from developer Abbott Laboratories, Inc., in 2003. Rythomol was originally developed in Europe and marketed by Knoll Pharma both in Europe and North America. The product was taken over by Abbott in 2001 when Abbott purchased Knoll.

Reliant Pharmaceuticals filed a federal patent infringement lawsuit against generic drug maker Par Pharmaceuticals, Inc., on December 19, 2006. The lawsuit, filed in the federal district court for Delaware, seeks to prevent Par from manufacturing a generic version of Rythmol. Par is seeking approval to do so from the U.S. Food and Drug Administration.

Reliant's patent for the drug was issued in October, 1997, and it expires in 2014. Par believes the patent is invalid, according to its filing with the FDA.

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