Patent No. EP2563906 (titled "Improved Cell Cultivation Process") was filed by Novartis on Apr 25, 2011. The application was issued on Nov 8, 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 |
|---|---|---|
| F HOFFMANN LA ROCHE | Aug 8, 2018 | VOSSIUS & PARTNER PATENTANWALTE RECHTSANWALTE MBB |
| MAIWALD | Aug 8, 2018 | - |
| NEUEFEIND | Aug 8, 2018 | MAIWALD |
| WEINZIERL | Aug 8, 2018 | SCHIWECK WEINZIERL KOCH PATENTANWALTE PARTNERSCHAFT MBB |
| GRAF VON STOSCH | Aug 7, 2018 | GRAF VON STOSCH |
| STRAWMAN | Aug 7, 2018 | D YOUNG |
| DEHNS | Aug 3, 2018 | DEHNS |
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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