Patent No. EP4186927 (titled "Methods And Compositions For Modifying Macrophage Polarization Into Pro-Inflammatory Cells To Treat Cancer") was filed by OSE Immunotherapeutics on Oct 21, 2016. The application was issued on Apr 23, 2025.

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 |
|---|---|---|
| BYONDIS | Jan 22, 2026 | VAN GENT |
| STRAWMAN | Jan 16, 2026 | POTTER CLARKSON |
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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