Patent No. EP2563904 (titled "Improved Cell Culture Medium") was filed by Novartis on Apr 25, 2011. The application was issued on Jan 21, 2015.

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 |
|---|---|---|
| CABINET LAVOIX | Oct 21, 2015 | LAVOIX |
| F HOFFMANN LA ROCHE | Oct 21, 2015 | VOSSIUS & PARTNER PATENTANWALTE RECHTSANWALTE MBB |
| UCB BIOPHARMA | Oct 21, 2015 | MAIWALD PATENT- UND RECHTSANWALTSGESELLSCHAFT MBH |
| WEISS | Oct 21, 2015 | WEICKMANN & WEICKMANN PARTMBB |
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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