Patent No. EP1974014 (titled "Oligopeptide-Free Cell Culture Media") was filed by Baxalta on Jan 3, 2007. The application was issued on Apr 19, 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 |
|---|---|---|
| ALCONADA RODRIGUEZ | Jan 19, 2018 | ABG LAW |
| MATHYS & SQUIRE | Jan 19, 2018 | ZWICKER |
| STORZ | Jan 19, 2018 | - |
| THOMAE | Jan 19, 2018 | WOHLFAHRT |
| CSL BEHRING | Jan 18, 2018 | WISE |
| STRAWMAN | Jan 17, 2018 | MEWBURN ELLIS |
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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