Patent No. EP2510948 (titled "T Cell Activation Inhibitor, Pharmaceutical Composition Containing Same, And Screening Method For T Cell Activation Inhibiting Substance") was filed by Mitsubishi Tanabe Pharma on Dec 8, 2010. The application was issued on Sep 9, 2015.

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 |
|---|---|---|
| ABBVIE | Jun 7, 2016 | 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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