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Patent No. EP2579983 (titled "Nox Storage Catalyst With Reduced Rh Loading") was filed by Basf on Jun 9, 2011. The application was issued on Aug 9, 2023.

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 | Dec 7, 2018 | BOULT WADE TENNANT |
| UMICORE | Dec 7, 2018 | VOSSIUS & PARTNER PATENTANWALTE RECHTSANWALTE MBB |
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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