Patent No. EP3214091 (titled "Use Of Chimeric Antigen Receptor-Modified T Cells To Treat Cancer") was filed by The Trustees OF The University OF Pennsylvania on Dec 9, 2011. The application was issued on Oct 3, 2018.

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 |
|---|---|---|
| PLASSERAUD | Jul 3, 2019 | ZWICKER |
| MEDECINS DU MONDE ET AL | Jul 2, 2019 | VIAL |
| MILTENYI BIOTEC | Jul 2, 2019 | MICHALSKI HUTTERMANN & PARTNER PATENTANWALTE MBB |
| PUBLIC EYE | Jul 2, 2019 | VIAL |
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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