Patent No. EP3638243 (titled "Methods For Treating Myeloproliferative Neoplasm-Associated Myelofibrosis And Anemia") was filed by Celgene on Jun 13, 2018. The application was issued on Aug 7, 2024.

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 |
|---|---|---|
| MAIWALD | May 7, 2025 | MAIWALD |
| WUESTHOFF & WUESTHOFF PATENTANWALTE PARTG MBB | May 5, 2025 | 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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