Patent No. EP3551181 (titled "Treatment Comprising Oral Or Gastric Administration Of Edaravone") was filed by Treeway TW on Jan 17, 2018. The application was issued on Nov 18, 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 |
|---|---|---|
| BARDEHLE PAGENBERG PARTNERSCHAFT MBB PATENTANWALTE | Aug 18, 2021 | BARDEHLE PAGENBERG PARTNERSCHAFT MBB PATENTANWALTE RECHTSANWALTE |
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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