Patent No. EP3387138 (titled "Scalable Purification Method For Aav9") was filed by The Trustees OF The University OF Pennsylvania on Dec 9, 2016. The application was issued on Jan 26, 2022.

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 |
|---|---|---|
| JAMES POOLE | Oct 25, 2022 | CARPMAELS & RANSFORD |
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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