Patent No. EP2906683 (titled "Mammalian Cell Culture Processes For Protein Production") was filed by Bristol Myers Squibb on Oct 14, 2013. The application was issued on May 31, 2017.

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 |
|---|---|---|
| NEUEFEIND | Feb 28, 2018 | NEUEFEIND |
| F HOFFMANN LA ROCHE | Feb 27, 2018 | VOSSIUS & PARTNER |
| F HOFFMANN LA ROCHE | Feb 27, 2018 | 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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