Patent No. EP3409274 (titled "Dosage Regimen For A S1P Receptor Agonist") was filed by Novartis on Dec 21, 2009. The application was issued on Nov 20, 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.
| Company | Opposition Date | Representative |
|---|---|---|
| HAMM & WITTKOPP | Aug 18, 2020 | - |
| VON SEEBACH | Aug 18, 2020 | 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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