Patent No. EP3052168 (titled "Therapeutic Agents For Delivery Using A Catheter And Pressure Source") was filed by Cook Medical on Sep 29, 2014. The application was issued on Nov 27, 2019.

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.
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.