Patent No. EP2478907 (titled "Methods And Compositions For Treating Cancer") was filed by Cougar Biotechnology on Aug 23, 2007. The application was issued on Apr 14, 2021.

Patent oppositions filed by competitors challenge the validity of a granted patent. These oppositions are typically based on claims of prior art, lack of novelty, or non-obviousness. They are a key part of the process for determining a patent's strength and enforceability.
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