Patent No. EP1810026 (titled "B7-H1 And Methods Of Diagnosis, Prognosis, And Treatment Of Cancer") was filed by Mayo Foundation FOR Medical Education And Research on Oct 6, 2005. The application was issued on Apr 18, 2018.

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 |
|---|---|---|
| JANSSEN BIOTECH | Jan 18, 2019 | CARPMAELS & RANSFORD |
| MERCK SHARP & DOHME | Jan 16, 2019 | CARPMAELS & RANSFORD |
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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