Patent No. EP2643082 (titled "Diesel Oxidation Catalyst Articles And Methods Of Making And Using") was filed by Basf on Nov 22, 2011. The application was issued on May 10, 2017.

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 |
|---|---|---|
| JOHNSON MATTHEY PUBLIC | Feb 12, 2018 | NUNN |
| UMICORE | Feb 12, 2018 | - |
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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