Patent No. EP1872136 (titled "Methods And Products For Evaluating An Immune Response To A Therapeutic Protein") was filed by Biogen Idec MA on Apr 4, 2006. The application was issued on Feb 8, 2023.

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 |
|---|---|---|
| SIMPSON, ALISON URQUHART-DYKES&LORD LLP | Nov 18, 2015 | MITCHELL |
| PHARMACEUTICAL WORKS POLPHARMA SA | Nov 17, 2015 | 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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