Patent No. EP3265122 (titled "Combination Of A Pd-1 Antagonist And Eribulin For Treating Cancer") was filed by Eisai R&D Management on Mar 3, 2016. The application was issued on May 4, 2022.

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 |
|---|---|---|
| GENERICS UK | Feb 3, 2023 | ELKINGTON AND FIFE |
| PAJARO | Feb 3, 2023 | BIRD & BIRD |
| KONIG SZYNKA TILMANN VON RENESSE | Jan 23, 2023 | KONIG SZYNKA TILMANN VON RENESSE PATENTANWALTE PARTNERSCHAFT MBB DUSSELDORF |
| WUESTHOFF & WUESTHOFF PATENTANWALTE PARTG MBB | Jan 18, 2023 | WICHMANN |
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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