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OSI Pharmaceuticals Receives Additional U.S. Patent for Tarceva

June 7, 2005

OSI Pharmaceuticals has been issued a U.S. patent covering the production process for a crystalline polymorph of its cancer drug Tarceva (erlotinib HCl).

The claims in the patent will extend exclusive protection of Tarceva until 2020, the company said. Tarceva is also protected by a U.S. patent issued in 1998 that covers composition of matter, preparation processes, methods of treating cancer and pharmaceutical compositions containing Tarceva.