Patent No. EP2361085 (titled "Use Of Anti-Vegf Antibody In Combination With Chemotherapy For Treating Breast Cancer") was filed by F Hoffmann LA Roche on Nov 20, 2009. The application was issued on Jan 2, 2019.

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.
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.