Patent No. EP2506850 (titled "Methods Of Administering Pirfenidone Therapy") was filed by Intermune on Dec 3, 2010. The application was issued on May 13, 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 |
|---|---|---|
| INTAS PHARMACEUTICALS | Feb 15, 2021 | ACCORD HEALTHCARE |
| GENERICS UK | Feb 12, 2021 | TER MEER STEINMEISTER & PARTNER |
| SANDOZ | Feb 11, 2021 | ELKINGTON AND FIFE |
| AERA | Feb 3, 2021 | AERA |
| ALFRED E TIEFENBACHER | Jan 26, 2021 | HAMM & WITTKOPP |
| STADA ARZNEIMITTEL | Jan 26, 2021 | HAMM & WITTKOPP |
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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