Patent No. EP3021869 (titled "Methods Of Treating Cancer Using Pd-1 Axis Binding Antagonists And Tigit Inhibitors") was filed by F Hoffmann LA Roche on Jul 16, 2014. The application was issued on Jul 15, 2020.

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 |
|---|---|---|
| ARES TRADING | Apr 15, 2021 | MERCK SERONO |
| JAMES POOLE | Apr 15, 2021 | CARPMAELS & RANSFORD |
| DR H ULRICH DORRIES | Apr 14, 2021 | DORRIES |
| DR H ULRICH DORRIES | Apr 14, 2021 | DORRIES, HANS ULRICH , DF-MP DORRIES FRANK-MOLNIA & POHLMAN |
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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