Patent No. EP2483289 (titled "Methods Of Preventing And Removing Trisulfide Bonds") was filed by Biogen Idec MA on Oct 1, 2010. The application was issued on Mar 26, 2025.

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 |
|---|---|---|
| ARNOLD & SIEDSMA | Dec 20, 2019 | PRINS |
| HOFFMANN EITLE | Dec 20, 2019 | HOFFMANN EITLE |
| PATENTANWALTE ISENBRUCK BOSL HORSCHLER PARTG MBB | Dec 18, 2019 | SIMMONS & SIMMONS MUNICH |
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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