Patent No. EP3880824 (titled "Control Of Trace Metals During Production Of Anti-Cd38 Antibodies") was filed by Janssen Biotech on Nov 13, 2019. The application was issued on Jul 24, 2024.

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 |
|---|---|---|
| DEHMEL & BETTENHAUSEN PATENTANWALTE PARTMBB | Apr 24, 2025 | RUCKERL |
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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