Patent No. EP2622074 (titled "Library-Based Methods And Compositions For Introducing Molecular Switch Functionality Into Protein Affinity Reagents") was filed by Board OF Trustees OF Northern Illinois University on Sep 29, 2011. The application was issued on Nov 12, 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 |
|---|---|---|
| CHUGAI SEIYAKU KABUSHIKI KAISHA F HOFFMANN LA ROCHE | Aug 11, 2015 | VOSSIUS & PARTNER PATENTANWALTE RECHTSANWALTE MBB |
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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