Patent No. EP3611169 (titled "New Gadolinium Chelate Compounds For Use In Magnetic Resonance Imaging") was filed by Bayer on May 30, 2016. The application was issued on Jul 21, 2021.

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 |
|---|---|---|
| DE SIMONE & PARTNERS | Apr 20, 2022 | PACE NAPOLEONE |
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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