Patent No. EP3053580 (titled "Method Of Providing Pirfenidone Therapy To A Patient") was filed by Intermune on Dec 18, 2007. The application was issued on Jun 30, 2021.

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 |
|---|---|---|
| ZENTIVA KS | Mar 30, 2022 | ALT |
| GENERICS UK | Mar 29, 2022 | TER MEER STEINMEISTER & PARTNER |
| STADA ARZNEIMITTEL | Mar 29, 2022 | HAMM & WITTKOPP |
| AERA | Mar 28, 2022 | AERA |
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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