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Helsinn Healthcare S. A. v. Teva Pharmaceuticals USA, Inc.

Justia Summary

Helsinn makes a treatment for chemotherapy-induced nausea using the chemical palonosetron. While developing that product, Helsinn granted another company the right to market a 0.25 mg dose of palonosetron in the United States; that company was required to keep proprietary information confidential. Nearly two years later, in 2003, Helsinn filed a provisional patent application covering a 0.25 mg dose of palonosetron. Helsinn filed four patent applications that claimed priority to the 2003 date. Helsinn’s fourth application, filed in 2013 (the 219 patent), is covered by the Leahy-Smith America Invents Act (AIA). In 2011, Teva sought approval to market a generic 0.25 mg palonosetron product. Helsinn sued for infringement. Teva countered that the 219 patent was invalid under the “on sale” provision of the AIA, which precludes a person from obtaining a patent on an invention that was “in public use, on sale, or otherwise available to the public before the effective filing date of the claimed invention,” 35 U.S.C. 102(a)(1), arguing the 0.25 mg dose was “on sale” more than one year before Helsinn filed the 2003 application.

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