Patent No. EP4124339 (titled "Drug Delivery Systems And Methods For Treatment Of Bladder Cancer With Gemcitabine") was filed by Taris Biomedical on Mar 6, 2015. The application was issued on Sep 10, 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 |
|---|---|---|
| GRUND GROUP PATENTANWALTE UND SOLICITOR PARTG MBB | Jun 10, 2026 | GRUND |
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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Sep 30, 2015