Patent No. EP2400847 (titled "Specific Diarylhydantoin And Diarylthiohydantoin Compounds") was filed by Medivation Prostate Therapeutics on Feb 24, 2010. The application was issued on Dec 17, 2014.

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.
| Company | Opposition Date | Representative |
|---|---|---|
| GENERICS UK | Sep 17, 2015 | FRKELLY |
| LEK PHARMACEUTICALS DD | Sep 17, 2015 | MAIWALD PATENT- UND RECHTSANWALTSGESELLSCHAFT MBH |
| ACTAVIS GROUP EHF | Sep 11, 2015 | ELKINGTON AND FIFE |
The dossier documents provide a comprehensive record of the patent's prosecution history - including filings, correspondence, and decisions made by patent offices - and are crucial for understanding the patent's legal journey and any challenges it may have faced during examination.
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