Patent No. EP2583979 (titled "Antibodies Directed Against P19 Subunit Of Human Il-23 - Use For The Preparation Of Therapeutic Molecules") was filed by Effimune on Oct 19, 2011. The application was issued on Dec 16, 2015.

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 |
|---|---|---|
| JANSSEN BIOTECH | Sep 16, 2016 | GOODFELLOW |
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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